Cheers Eddy, how long was the delay from Chai ? also did you get the ballscrews machined locally or by chai and if so would you recommend it? i might get it done locally because i have access to a lathe but if it's not too costly to get it done by Chai i might go that route but then i have read that some of the screws turn up slightly bent. i have used suppliers from china in a previous life ( job) and remember some of the parts delivered with poor packaging and very little protection ( not all suppliers ). it's very helpful to have the experience of previous builders who have gone down this route, hence all the questions!!!