For the build plate, it is going to be

• 1 X Build Plate
• 4 X Wheel kits
• 4 X M5 25 mm bolts
• 2 X 6 mm spacers
• 2 X 6 mm eccentric
• 1 X 8 mm anti backlash lead screw nut block, the non anti lock is not included
• 2 X M5 nuts
• 2 X 3 mm spacers
• 2 X M5 x 20 mm screws
• 1 X 500 mm C beam

Clean the 500 mm C beam of swarf, check for issues where the wheels will track.

Take the build plate and drill out the 8 out-most holes to 6 mm so that the self tapping screws will just pass thru, this is where the MDF or such mounts and rather than do it later when the wheels and nut runner is installed, so less chance of getting swarf into them. Countersink the holes a little, just to knock out the edges.

Build the wheel kits

Same as before

Take note of orientation of the build plate, install two with eccentrics, two with 6 mm spacers. 25 mm bolts

Both on with 6 mm spacers

Eccentric side 2 mm bolts

Install the wheel kits, 1 mm spacer on top of the 6 mm spacer, and samee on the eccentrics spacers, add wheels then the nut and tighten

Anti-back lash nut, I've already installed the set screw and holding nut here.

Install the bolts for the nut screw so the lead screw would be centered

Add the nuts to the holders.

Clean out the nut again, this one was the worst of the bunch so far, I could barely thread it the start, and also had to treat the threads on the lead screw where they've been cut, small file again to clean up the edges. Ended up with the cordless drill slowly moving the lead screw back and forward after about 10 cycles by hand first.

This is the result

Next add the gantry plate to the last 500 mm C Beam, adjust the eccentrics as before, so nice and tight and no slop.

Next step is prepping the MDF for mounting and waste board. Then building the frame out.