Core XY PrntQB

Update

It's all come together and is now up and running. There is a video of it in action here http://youtu.be/kt5dA0ThEg0

Final build dimensions worked out at 240 x 210 x 120 for X, Y & Z. I could get more Z height by tweaking the bed and hotend mount arrangements but the easiest solution is probably to increase the size of the four extrusion uprights and use a longer leadscrew and rail on the Z carriage. 120mm is fine for me but others may want more.

I've only had it running for a d