Allow wider PSU, move PSU down
Lasercut PSU spacers

A nice thing about this is that on smaller printers, the top rear brace
may stabilize the PSU, since the PSU will be resting against it.  Since
smaller printers will only be able to use two of the four PSU mounting
holes, this may be a good thing.
Holes for feet!
Progress toward 6x6x7-friendly design
Note lengths of rods
More accurate depth calculation, y carriage, bed
Preview image shows bed