Re the no cursing, I’ll note that we don’t have a full real-time camera record.

"a trainload of people"? I see what you did there! LOL

Me too. I am a trainer also. Radio, electronics and computers. Big stuff up potential.

That would have been tempting if he'd been deep into the work, but recasting seems like the right call when all he has done so far is clean up the two faces. The lesson here is not the thing he did wrong, it's the thing he did right - check your work after each operation. This is a small fail, waiting until you're fitting the finished part to find the incorrect dimension is much worse.

Brazing or flat knurling would work but if he’s like me every he saw the repair in the future he’d see his painful mistake all over again. Better to make all new parts to print and move on.

This was my first thought. Since new casting would be expensive and time consuming. It's even admittedly not a critical dimension.

@@d3faulted2 Couldn't he just shim it? If it's only 25 thou, seems like that would be a quick and easy fix. But I guess it would annoy him every time he looked at it.

@@jsaurman The crank pins are capped so a shim would need to be split, which won't work as they would drop out...

They've scrapped a lot of parts as well.

Reminds me of what someone told me about making mistakes. The one person that claims to have never made a mistake either is a liar or never has worked. And I luckyly was taught to never see a mistake about something to be ashamed of, unless it was amassed "idiocy" or negligence that led to it. The most important thing, if you make a mistake, stand up to it and try to correct it. Also, look at how we learn Maths and stuff at school. We make mistakes, we learn why it was the wrong way, we try again. Mistakes should always be seen as a learning experience. And while we as humans, working in a professional manner and a professional environment, have become extremely good at either preventing mistakes or catching them at such an early stage that we can recover, even in automated industrial size mass production mistakes happen. there might be an air bubble in a line, screwing up something, some piece of debris made its way into something, just something breakes (although we could argue if that would be a mistake in the first place, but there are usually mistakes that lead to something breaking, like lack of or improper maintenance or too much wear). And then add in a human. There might be that split second where we don't pay attention or get distracted. It is easy for us to mix up measurements or sizes. We might simply not fully understand what we are doing and what we should be paying attention too. There is plenty where things can go wrong. And sure, things at some point will always go wrong. That is also, why we put so many layers of protection and procedures in certain fields, flying an aircraft or just riding a car. We cover them in so many blankets, just to make sure we can allow for a mistake or two, because we can strieve for it, but we will never be able to completely avoid making mistakes.

Yes! I was wondering what "could" be done if a person had to. I was wondering how this casting could be built up. I was thinking Sillfos, or something involving less heat such as soft solder. Your method sounds reasonable.

@@bryanh1944FBH In 1917, and around that period, that would be done unless there were replacement castings readily available, like on hand.

Some days the elevator, some days the shaft.

@@peterhobson3262 yup

I'm 100% sure Keith and all the others made lots of mistakes as an apprentice. But they learned from them. Keep making chips and slowly (sorry it takes time) you get better. Churchill quote "Never give up, never give up, never give up!"

It's your life, doesn't matter if you really are the worst machinist, cook, knitter, ect ever. Are you doing what you want to do and overall enjoying it? If yes then rock on, simple as that. Now if you get into designing and building nuclear reactors, or doing medical procedures that one very tiny slip can leave a person paralyzed rather than fix their condition then yes you need years of training and be selected from a very big pool that you really are among the best of the best of lol. But mistakes will still happen if even if any of us was some of the best in the world. Look at all the mistakes both sides made in the space race and still do to this day.

Being good at woodworking means being good at hiding mistakes.

At least your material grows on trees!