I'm not an engineer but I have slowly migrated from bench fitting to electronics to computers, I could have done something myself but I have a young family and don't have the time. The only people with the time and space to do it are usually 50+ as they have more expensive houses and the kids have gone.
I have a nice size workshop now but need to wait until the kids don't need constant attention, even then I'd probably not attempt what you have done unless it fulfills a specific need that I can't get elsewhere.
Brunel had the innovation, he didn't do the donkey work.
From a very young age I have always had projects on the go, they push you mentally and also improve your skills, the old saying "use it or lose it!" springs to mind. I've got children too, grown up now, that didn't stop me building motorcycles, boats etc. I used the back door step or a wall as my work bench in those days, where there's a will there's a way. Kids are gone now, so I've now got a back bedroom as my workshop.
Don't you think that people living in other countries who do the work on their own bikes, have the same pressures as we do in this country?
What has happened to the British people?
Brunel is turning in his grave because Great Briton isn't great any more!
Griz