To make a static model with that level of detail would be an impressive achievement. To make a working steam loco with that much working detail is simply phenomenal. You deserve all the plaudits coming your way

This is one of, if not the best miniature locomotive I've seen! An absolutely superb engineering masterpiece, even sounds like the full size loco

Fabulous! Anyone who models Caprotti valve gear deserves a medal!

Brilliant stuff. Not just the model - that's a total work of art - but the shooting, editing and narrating. That's the way to do it. Thank you.

That's an insane level of detail, absolutely stunning.

Absolutely incredible !!! What marvellous workmanship and attention to detail. Thank you for bringing the Duke back to life.

I can’t imagine how excited I’d be for the first fire after four years of work! Congratulations, team 😌

Absolutely outstanding. As a machinist myself of 30 years, this locomotive is brilliant.

The most remarkable thing that I've ever seen, lost for words! 👏👏👏

A quality of workmanship defying description. Truly a thing of beauty. Congratulations!

A credit to all concerned - what a comission! I imagine its owner would be delighted. It's gratifying to see that craftsmanship is still alive and well in England in the 21st century.

Fantastic. Unfortunately, a fleet of these was a fantasy. The resurrection and correction of the prototype was, astonishingly not a fantasy and I love it! What a fine machine! Well done.

That is just the most beautiful example of miniature engineering I've ever seen. The attention to detail is exemplary. You should all be extremely proud of what you've achieved. Thank you.

Just happened to come across this video and the level of detail on this fully functional model is mind blowing! It's literally like the real deal, only smaller.

Absolute masterpiece. A gem of details throughout which must've taken so many rare skills. I can do the basics in a machine shop and knock out simple engines but so much more has gone into this, parts I wouldn't know where to begin with.

As a mediocre machinist, I can't possibly imagine the amount of work you guys put in that!

I have been privileged enough to see many sights with my own eyes, things which still leave me with awe when I think back on those memories and recollections. I can comfortably say this locomotive in this video is hands down one of the coolest and most amazing works of man I have ever seen done not for "practical" purpose, but out of love and passion for a niche. The level of detail for no other reason than "the details are important to what we want to do with this" is not only admirable, but astounding. I came here from the thumbnail showing the largest model locomotive I had ever seen, but I stayed for the love and passion put into this project. My closeted autism is thoroughly pleased, and I will be promptly go from watching this video to playing Railway Empire via Steam lol. Well done old chaps.

Incredible in all that detail! A masterpiece of locomotive modelling!

This is the most faithfully produced working model replica of a real locomotive I have ever seen. A true masterpiece!

This is quite exceptional. Not only is it stunningly accurate, but it's so well crafted and put together, and the fact it's a working model makes it even more remarkable. It really is like you took the real thing and put it in that device from Honey I Shrunk The Kids. I wish you could build me one!

A beautiful Locomotive, outstanding workmanship, attention to detail is mind-blowing!

I've just come across the channel, that is the most beautiful locomotive I've ever seen. You should all be congratulated on such great workmanship, truely amazing.

I don’t even have words to describe how beautiful this locomotive looks 😂

Dennis Evans was the original builder a remarkable Gentleman and Engineer, he went on to build a 5" Caprotti Std 5 and then a 3 and 1/2" Duke of Gloucester, I am proud to have known him and delighted to share space with the full sized Duke which is well on the way back to life.

As everyone else has said: what magnificent engineering to produce such a beautiful locomotive. 71000 full size is one of my favourites.

The epitome of British steam , model and full size !! Breathtakingly gorgeous loco . So glad to see she has been built with the correct "Duke modifications " that should have been included in the first place , I feel that the Duke has been vindicated in terms of performance . well done guys , every one .

The Genius of John Holroyd - this is incredible. I watched some of the work that John was doing on it early on - but now it's great to see it completed running on Steam Well done Steam Workshop - !

What a superb bit of engineering. Stunning when you consider it's all bespoke and operational. Love the cam operated valve gear. I have never seen that on a loco. Magnificent.

I do not possess the ability to put into words the marvel of this beautiful piece of art work.

An amazing journey job... A huge engineering effort... Not simply in model terms but in a functioning piece of machinery.

An absolute credit to the builders of this magnificent machine.

Four years may seem like a long time for a rebuild at this gauge. But this is the end result. Sheer quality and well worth waiting for.

A Model Engine Working Masterpiece ........ The Attention to Detail Is Phenominal.

Not only a real masterpiece but a true work of art, much better than something like a van gogh painting. Well done for everyone's hard work.

This is easily the most detailed, faithfully modeled engine I've ever seen. Very well done.

Dennis built other models of this locomotive in 5" and 3.5" gauges and all were superbly detailed.

Beautiful! Really brings a tear to the eye! Well done lads 🙌🙏 such a faithful recreation

There are simply insufficient superlatives to even begin to praise this locomotive and all who worked on it. Fantastic!

Iam not a real train fan, but this is at a level that would make anyone with a pulse watch, the detail is just amazing. Really words cannot express the attention to detail. Keep up the good work and thank you so much for the video....

This is certainly a masterpiece! Incredible amount of engineering, art, and time has been well spent. Congratulations for finishing this and thank you for sharing this to the internet.

How on earth could this NOT impress you! Absolutely amazing.

This has added immensely to my understanding of how a steam loco works. And what a model!

This loco is a work of art the complexity in the valve gear insane amounts of work runs beautiful 😍 skilled engineers!! Would love that in the loungeroom $$$ 😅

An absolutely fantastic model. There are few superlatives to describe the incredible attention to detail. Loved this vid. A real credit to the builder.

That is an absolutely wonderful locomotive. Thanks for showing the controls (cab and on the locomotive) and especially the detail of the Caprotti.

This is just incredible. I’ve seen many fully functional models, but this level of quality and detail is just astonishing.

Stunning! Reminds me of staring at the real thing at Dicot after its initial restoration. A credit to you all.

What a work of art! Also thank you for the narration, I’m learning new things.

Astounding , I didn't think I'd see a loco with that detail and care of build . 👍🇬🇧

Stunning piece of engineering. Unbelievable attention to detail.

It's really hard to describe how beautiful this steam engine and tender is, the attention to detail and workmanship is amazing. Congratulations I love it from a RC model aircraft builder and flyer. John from Hayden, Idaho usa

This is amazing! Incredible level of craftsmanship.

I remember standing on the footplate of Loco 71000 in Barry Island scrapyard in 1968. Great tribute to the engineering then and now. Great to think almost all the locos from the yard where saved.

My mind is boggled by the level of workmanship

Forget going to Paris to stand in a line to see DaVinci's Mona Lisa, this is a real masterpiece.

I remember this loco from around 1980 at Halton Miniature Railway - good to see it's being looked after

work of art.. it so good to see this level of enginering still alive and well...

An absolutely amazing replica. I've been lucky enough to see and travel behind the real thing so I know just how authentic this is.

Absolutely amazing that is true British talent ! Not like one of those people dancing around on the tv Absolutely fantastic 👍🏻

I've never seen a live steam loco look so good! Congrats on getting it to work, and especially with the Caprotti valve gear! I love this model!!

What an astounding piece of engineering, well to done everyone involved!

Good heavens. The level of detail is outstanding. And it all works! Mind blown!!!

My wife asked what I was watching because my mouth was open the whole time. I have never seen anything like it. I think I have to re-watch this a few times to fully soak up the level of detail on this. Outstanding work.

Always nice to see two happy people…

And now... I must squeeee! Caprotti valves, Kylchap blast-pipes... my favorite loco, in 1/7! Hope the full-size resto is doing well.

I'm blown away by the quality of workmanship and the level of detail. amazing machine!

WOW ‼️ I wonder how many hours have gone into the original build + the restoration? The detail is fantastic, and the workmanship is obvious. Congratulations chaps 👏👏👏 Regards Robert

I can not even imagine how much it would cost to build. This is a masterpiece.

Simply superb. A masterpiece indeed.

That’s a thing of beauty, the level of detail and engineering is amazing.

Unbelievable. What an amazing achievement. She looks beautiful. Well done all. Mick.

Wow for this to be a working loco with that level of detail is absolutely amazing keep up the amazing work!

I served my time as a toolmaker in the nineteen sixties. I would be well proud if I had made this.

What a beautifully detailed and faithful replica of the real engine. Well done to all those who made it happen .

Stunning! Congratulations to the team who rebuilt this locomotive in such a realistic manner.

Being an ex. Toolmaker, I can really appreciate the level of skill and craftsmanship required to achieve this !! You can't do it all on machines. Just fantastic super high level skills. Well done.

Fantastic loco !!! I remember this being built and have a couple of photos, when I visited to see the Britannia class loco, Boadicea, I bought a couple of years ago. Boadicea is getting near to finish after a major rebuild since.Well done and most enjoyable seeing this.Thank you.

That is one absolute masterpiece. Well done to all involved.

You chaps are absolute geniuses. Meticulous to the last detail. You keep alive an art that is on the wane.

What a fantastic locomotive. Real credit to the engineering skills of all your team.

Level of detail on this is remarkable, everything beautifully made and working as closely as possible to the full size engine. Not only an engineering masterpiece but a work of art too.

Just yaw dropping detail, i can watch this over and over👌👏

This is a superb locomotive. I remember Dennis bringing it to the Walsall Steam Railway c.1980 when I was a driver there. I never got anywhere near driving it.

Wow congratulations for getting duke of Gloucester back into steam well done Simon

The finest model engineering I have ever seen; matches that of the wonderful Cherry Hind-Hill at a tiny scale. Arguably her small scale work is even more demanding, but the fidelity shown in the Duke has never been surpassed in anything I’ve seen - and I’ve seen a LOT!

Attention to detail is insane

This is what I love to see TRUE Scale models! It would be fab to see this running on the track at West Park in Hull! My nearest track!

Impeccable workmanship. A work of skill and art.

What gorgeous craftsmanship......a credit to all involved.🚂

I can't imagine the thousands of hours it took to build, the detail is incredible!

Wow what a labour of love! A magnificent locomotive and the video is very well narrated and explained

We have such talented and skilled engineers like these. It saddens me that the UK is not the world force it used to be as an engineering & manufacturing country across the board. With the ability to produce such small scale wonders we should be leading the Japanese and Germans in full scale engineering. This working loco is a more than a masterpiece.

Lovely whistle - so tricky to get right in miniature. Whole thing is magnificent!

What a tremendous effort to recreate this in miniature.

What a beautiful engine u own ron i had the pleasure of riding this beautiful masterpiece at echilles wood 7 1/4 inch gauge gala on the 16th of july with a friend Mark Franklin

The only things I noticed missing were the tea caddys and work bags in the lockers. What an excellent detailed model.

What a fantastic 'model'. Miniature engineering masterpiece more like it! Thanks for sharing. Al.

That is absolutely awesome. The level of detail is fantastic.

Damn guys that is absolutely amazing! Fantastic work 😁👍👍👍

Good grief!! That's a thing of wonder, unbelievably beautiful. Thanks for sharing.