I am in the UK too, I also make RC car parts on a converted X2 (mine is a Chester UK machine). I got some ballscrews and Gecko G201 drives from homeshopcnc. Good service, reasonable prices I thought. I used a breakout board from CNC4PC. I run my system on 39VDC and have NEMA34 450 oz.in motors. I have been very happy with this set up over the last few years and it has put in an awful lot of work. Certainly recommend this equipment if you want good stuff that is possibly a bit over-spec for the X2. I could easily get an X3 and swap everything over to that, for example.