Alan, Biggles, I have been thinking about all that and wonder why I am considering it at all, I hope in the end commonsense and the reality about how much/longer I can ride for to make it worhwhile.
My local motorcycle stealer charges $30 per tyre and that is me taking the wheels and tyres into them, it does include them disposing of the old tyres.
I also have 5 cars and 2 bikes so this machine would do tyre changes for all of them, then there is Lionel and Chops to change treads for . .
Maybe not . .