Another DIY CNC router, part 8 (better flatness, preparing aluminium parts)

0:00 replacement ball screw for X axis
0:27 stone surface plates for sanding
2:40 flattening Z axis plate
3:46 using epic converted drill press tapping machine
8:18 fitting straightening bars under main table
14:20 tweaking gantry parts to fit
19:28 flattening back of gantry plate
22:40 machining front of gantry plate
34:41 making Y plates again, but square this time