what I found
On my machine I am working on I am using MDF and had used 2 blocks stacked on top of each other I then had drilled one hole on the corner of all the blocks and inserted a nut and bolt to tighten the corners after they were allighned then made a block that had the 3 remaining holes alighned and drilled the remaining 3 holes on each corner so they were indexed on the 1st hole I found the mdf was able to be drilled and tapped for a 1/4 bolt. I used 3/4 inch but it was brittle I feel because I had assembled my machine like you seemed to have by assembling the top and bottom frame and the the z axis. I was going to try it using the instructions on the wiki and see if building the 2 frames on top of each other would give me better allighnment then adding the "z axis". I also found it was brittle because I had not yet cut my rods to size.
Bruce Wattendorf
On my machine I am working on I am using MDF and had used 2 blocks stacked on top of each other I then had drilled one hole on the corner of all the blocks and inserted a nut and bolt to tighten the corners after they were allighned then made a block that had the 3 remaining holes alighned and drilled the remaining 3 holes on each corner so they were indexed on the 1st hole I found the mdf was able to be drilled and tapped for a 1/4 bolt. I used 3/4 inch but it was brittle I feel because I had assembled my machine like you seemed to have by assembling the top and bottom frame and the the z axis. I was going to try it using the instructions on the wiki and see if building the 2 frames on top of each other would give me better allighnment then adding the "z axis". I also found it was brittle because I had not yet cut my rods to size.
Bruce Wattendorf
