Thanks, i would go for whatever it feels happy with but I'm not going to waste time trying to get that little extra a the top end, if it only runs at 7000mm/min then thats my limit.
I still have a mountain of battles to win at present - seems the bearings in the screw end plates are wrong and not the correct pre-loaded pairs they should be, i will need to shim them out to give some pre-load without binding like they are at present. The correct ones it seems are about £100 a pair but these will do if shimmed up for a while.
I had to get the Y axis front bracket machined as the bolt holes did not line up, seems the new dog-bone screw mount is slightly longer than the old BP one so the Y axis screw sits a little lower than it should, found a local guy that did it for a reasonable price. If only i had a mill
Customers keep getting in the way with orders too