[maxxgraphix]

I decided to build my own 48 x48 x 3 cnc router. I didn't like the mdf so I'm using T-Slot and .5 aluminum plate. I did make a mistake I know of already in that I used 20mm 60" linear rods that are unsuported in the center. There is flex that equates into slop. They were cheap. I'm trying to design my plans based upon measurements from the materials I purchased. I hope to be within .002 in my design. Now I'm using a plain old drill press and chop saw. There is no way I can drill / cut to .002. Assuming some adjustment might be needed just how sloppy can the parts be made for this thing to work? I'm going to plot out my parts 1:1 and overlay the plot onto the aluminum stock and center punch the holes.