Thanks for all your kind answers to my previous post.
I now realize that I am a blind, one handed, non mechanically minded, retard.
Funny that, having worked for some world class companies as a Scientific Instrument Maker, made various steam and Stirling engines from scratch, oh and building Electron microscopes, duoplasmatrons, parts for Concorde etc.
All I hoped for was the information to enable me to get to the task with the minimum of fuss and with no chance of error, just like using a workshop manual to help rebuild a car.
Thanks again :blink: