A story is in order. I like a good tale.......
I framed homes for a lot of years. I started in Raleigh, NC. All the homes we built were stick framed (no roof trusses), so I learned how to lay out rafters for hip, gambrel, dutch hip, bastard hip, valley rafters, and of course straight run. After moving here I saw that everyone built using trusses and no one knew how to build even with the simplest of rafter layout.
Fast forward about 15 years...........the Frank Betz design was starting to show up in Cookeville and these homes have cut up stick framed roofs. It common for a Betz design to be bastard hip and valley with straight vaults thrown in to complicate things. I ended up very much in demand and kept two crews working framing for several years.
One day it was raining and another framer stopped by the job we were on to look over our framing. Just like porting saws, it's one thing to see the product and quite another to do it yourself. He asked a lot of questions and I gladly answered them.....we talked about run and rise, hip and valley......etc. I showed he a few tricks I had picked up on the finer points of maintaining the correct overhang height by varying the seat cut......and on and on....
A few days later I saw him and a large crew start a house in the same subdivision we were working. I didn't think too much about it......GW hadn't destroyed the economy yet and things were booming. After a few months though......this guy was cutting my prices, hiring low cost help and really putting out some good looking work..... Did I make a big mistake?????
I doubt it. He would have figured it out eventually or found somebody else. They built one of those type roofs up the road and got my father to cut the rafters for them when he was in his seventies bacause the framing crew didn't know how.
I find it hard to believe that fixing a particular carb on a couple of saws is going to effect your pocketbook enough to make it a big deal.
Has more to do with a personality than a pocketbook.