http://imgur.com/a/kszzz

There we go, third iteration. I've switched to square rails, 20mm. The frame is now a mix of 60x60mm and 80x80mm alu profiles. The alu plates are 20mm, except for the backpiece spanning the gantry, that one is 10mm.

The steppers should be more securely mounted, the gantry should be stiffer and hopefully I think it might be slightly easier to assemble.

What do you think? For some reason it just looks "wrong" to me, can't really put my finger on it.