ok, first attempt using sketchup 8

[deannos]

Looks like bloody good odds to me especially from such a simple and quick build

I agree, that's why i've decided to go the RSJ route, especially as i don't have any fancy tools. But i can weld and this will be far the easiest route for me, and there won't be a lot of drilling and tapping either. The only thing that worries me slightly is the weight of the gantry, i know weight is a good thing, but would this be to much to get decent speeds. Now i'm not looking to break any speed records, just to get a reasonable feed etc. The motors i have at the moment are nema23-3NM and MSD542 drivers with 50v power supply.

Dean