mATX quick swap PC test bench frame

Designed this as I have a bunch of cheap old mATX boards/cpus with stock coolers that I need to test quickly without having to faff about screwing each one down, and this is what I came up with to hold them.

Only tested on older budget mATX boards with stock intel coolers, so unsure whether this would go well with heavy tower coolers with backplates or more elaborate gaming motherboards... YMMV. 

Care will of course be required when connecting tight 24pin PSU motherboard connector when using this test bench/frame, advisable to do this while board not on frame.

This was not designed to look pretty, or hold expensive heavy graphic cards.. it was designed quickly to help get me through testing 20+ budget motherboards fast. It's not a permanent/performance testbench.

8 x Countersink M3 16mm length bolts were used to screw the thing together (may get away with slightly shorter or longer. Countersink bolts ensure the heads are short enough to be well clear of the motherboard. No idea if taller bolt heads will work - countersunk are just what I have on hand.

Though you can just sit the PSU loose on the rails underneath, there are 2 screw holes if it needs to be secure, the legs also allow for a bit of PSU airflow underneath.

There is an optional PSU holder piece that can hold a 3.5" drive and/or 2.5" drive loosely.
Didn't bother with holes to secure drives as I'll be fast swapping out a lot of drives.

2 x 3mm holes at each leg corner are purely there should I need to add a holder or something later, can be ignored for now (perhaps for a screwdriver holder to allow faster bridging of the power on jumper pins)

Print in the orientation of the original STLs.

The optional PSU holder piece will require some supports.

The Leg piece will need to be printed twice or course.