And a couple more pics. The double pinion gear on the Z drive is some sort of fluke in Sketchup that I Cant seem to delete for some reason. When I do it deletes the entire motor assembly. Also the two springs that tension the motor to the racks will also have the customary turnbuckles on them, I just didnt feel like drawing all that in!!
The last picture shows my thoughts for the X axis v rollers.