This video shows current operation, though I have since retensioned the spring and it ends a cycle, just sizes the records wrong. The adjustment on the selector arm still doesn’t correct this. So I think the spring was a problem, but beyond that I’ve got something else wrong. Ive has enough for today and unlikely I can work on it again for a a week or so.
Thanks again Barry for those pictures, really helpful. I may however need to find another on eBay and look at the two side by side to crack this. If only it was an autoslim
https://youtu.be/l3pIX7BvpPU