I salvaged an old drafting table arm with ball bearings mounted on eccentric bolts, for fine adjustment, and enough extruded rail to build my x-axis rails , Y-axis gantry rail and a 10" Z-axis. It should work out to a 36X24 table, once I supply the cross support rails for each end and one in the center, which will likely consist of 1X3 rectagular tubing. The extruded rails measure 3 1/2 by 1 1/4" and are quite rigid. Do you think these rails will be alright for a first project? My steppers and drivers are also depicted. I'm hoping they will have enough power.