If you've used it for long enough to wear out the ballscrews then you've probably made enough money to replace them.
thats the way iv been looking at it :naughty:

Ok jonathan you seem to know something all the top Ballscrew manufacturers in the world don't so get on with it and good luck.!!
thats a tad aggressive jazz .... in this sport there is an element of "art" and "on the cheep" im struggling to knock jonathans logic till i know better..... out of interest has anyone managed to wear out a ball nut in our DIY circle ?
and did they make enough to replace them lol