So I got the bearings for the y and z axis as free samples from PBC bearing. The target size is 18"x36"x4". I've started work on the y and z axis. This machine will be made from as many materials that i can scrounge. I'm using some 1/2" acrylic, 3/4" oak plywood, and whatever else i can beg borrow, or steal. Here's pictures of the free bearings and the beginnings of the y and z axis.