That looks awesome! Super realistic. Much much better than the original idea.

Purdy Cool Bill ! , You never cease to amaze me..😃

This looks super. You make it look easy.....but from where I'm sitting it is museum level artwork!

Very cool technique dear Bill, think this way of making a tunnel liner very well reflects the way a tunnel bore is hacked, whacked or bored, drilled or exploded. Way better than the uniform look of the shaper sheets!!

Bill, outstanding tunnel interior! From concept to production! 👍👍 I do not know if it was as easy to do as you made it look, but it, sure looks fantastic. 👍👍 I can not wait to see a train light coming out from that tunnel.

Hi ya Bill. Ah…….the old reverse tunnel boring technique! Classic. Nicely done. See ya next time.

Tunnel liner looks great Bill! Cool technique.

That Claude guy sounds like a real genius!! Seriously, that looks fantastic Bill! ...Claude

Hey Bill, Back in the mid-1950's I used the same Liner Plate tunneling system on my former "O" gauge layout. The long term problem I had was when running trains, or moving the layout, the tunnel walls would chip, crack, & collapse onto the track. While the ugly side is still accessible here is a trick I learned from the old Railroad Model Craftsman Magazine. Take an old ragged tee shirt from the junk drawer. Soak the shirt in in water. Carefully drape the damp shirt over the hidden tunnel walls. When wet the plaster will soften. But as it dries the shirt will strengthen and bond the plaster and anchor itself. And don't fret about trashing a build. I have had truck loads of good ideas gone bad over the past 70 years modeling. Jim in N.Y.

You are nuts… in a good way… but love you youtubes. You Are very good at making things look approachable. Thank you for all the effort

Tunnel look really great! Very complex process. 👍👍👍

Hi Bill this method of doing the tunnel is brilliant , I heard Dennis mention it on the BOT show with Dave and Mark . I missed this episode . Thanks for sharing

Nice solution for creating the tunnel liner. It came out nice.

looks good update bill keep up the good thanks lee

Great idea!

Turned out great Bill!

Looks great! Great solution to your failed attempt…. I’d say Plan B was the ticket…. !

That came out wonderful Bill, I'm sure the second one will be a lot easier and go quicker 👍👍

great idea, Bill. It looks like a real rock tunnel even before you stained it. I just may have to use this idea in N-scale. Thanks for sharing, David.

A slip form ? Nice technique . Would like to see the view from the cab . Thx for the vid. - Ken

Ok, I thought this was crazy…. But it turn out pretty good and I’m going to use this on next tunnel project.

I mentioned to another responder is that I am lucky that I don't have to model tunnels on my line. The reason is there are no RR tunnels or road tunnels in Kansas despite having 1000 ft. above sea level hills all over the place. Mostly I will be modeling cuts and fills and relatively high trestles. Planned into the current layout are two cuts and a small culvert at the fill on one side of one of the cuts. From what I see here the rockwork on my road will be carved mostly horizontally aligned and in the colors of sandstone, shale, limestone and other sedimentary formations, oh and brown coal seams.

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Great job! This is a little like sitting down in the middle of a movie and asking what happened at the beginning but what flex track/switches do you use?

I'm only 3 minutes into your video... but I don't think you are leaving enough clearance on the outside of the curve. To get my BigBoy and 4-12-2 to clear scenery and walls etc, on my Atlas O-72 curves, I have to leave at least the full width of the track (width of the sleepers about 70mm) to allow enough room for the nose of the BigBoy and the cab roof of the 4-12-2 to not hit anything. Just a thought. Great video on "How To". Pete

This looks great! Neat idea. I have one question. Why do all of the good modelers on youtube have beards. Is there a requirement I missed? HaHa.

Two rail O guage is way more realistic than 3 rail