Home built universal grinder

[albertq]

That explains why I do not do CAD, well just one reason anyway. That is not quite true, I do have my own CAD system which is outlined in detail at
Slotter or broach driver. Cardboard Assisted Design.

I also sometimes use your cardboard version of CAD.
But, after reading an article in a Kit Planes magazine some 10 years ago, written by an old toolmaker who claimed to have tried 20 odd CAD systems and always battled with it, until he came across Alibre Design which he described as intuitive and simple to learn, I decided to have a go. So I downloaded a 30 day free trial of Alibre design professional and I taught myself basic CAD literally in one day, it was really that simple, and by the end of the 30 day period I had designed the mechanics for a helicopter throttle governor system for my Ukrainian AK1-3 helicopter. I engaged a electronics engineer to handle the electronic control side as I'm useless at that, and made a number of retrofit governor systems for other pilots after obtaining approval from the helicopter manufacturer. After a month I already felt like very confident and fluent with CAD.
I later switched to Fusion 360 which was very similar and easy to transition to, and less costly for a retired hobbyist.
I am so glad I put in that one days effort to learn CAD, as it is now so simple to design and build the 3-D parts, then assemble them into a working project. It is easy to make changes to parts and assemblies that it encourages design experimentation of different concept ideas before choosing the best one to make.
The best part is once you have checked your assembly and make sure the movable parts function and don't interfere with one another, there are virtually no errors after construction is done and everything fits together just right.
I get as much pleasure creating using the CAD as I do actually making the parts. You should give it a try Tony, you won't be sorry.
I don't have shares or any interest in either of these CAD packages so no hard sell here.
Here is that Alibre CAD governor design after using the program a month and not full time. Also a photo of that governor design mounted to a helicopter.