Thanks @mylesdw thats really useful. Interestingly the two big tool holders it came with had large discs with bearings that looked like they should fit in a recess but they are too large for the lathe. When I first looked at this I assumed it would be an arrangement like yours but when I got hold off the parts diagrams it doesn't indicate a washer, the tool holder fits straight on (or at least thats what it looks like). I need to do something, not sure whats easier - create a recess like yours in the holder and a thick washer or as I planned take some off the bottom so the tool holder fits into the recess. something to ponder hmmmm When I get back home next week this is next on my mechanical list to address. Need to get the VFD boxed up as well.