Just an update.
I think many people who watch you-tube videos think the posters know what they are doing. Well in my case maybe once in a while. I do this because I am fortunate enough to have found a hobby that I truly enjoy. It allows me to create, experiment and learn. I can no longer work on cars and my wood working skills have largely passed. 3D printing is a lot of experimenting and testing and learning from your mistakes. I'm very good at mistakes - so I should be learning a lot. I recommend a number of you-tube channels for great information. These are some that I always try and watch
Kersey Fabrication / @kerseyfabs
Chris's Basement / @chrisriley
Dr Vax / @makewithtech
Tripod's Garage / @tripodsgarage
The edge of Tech / @theedgeoftech