Did 2 of them. Had to cut 3.5 bays.
The back of the case / expansion cards mounting, and mounting the motherboard is the hardest part.
Motherboard mounting was done like this...
NUT
MOTHERBOARD
NUT
|
| bolt
NUT
CASE
NUT
This allowed me to easily adjust/suspend motherboard height and align in the back for ports.
On one AT case, I cut with dremel and then made a thin plastic cover for the back with proper expansion/mouse ports cut out.
My ATX A4000D tower is not quite finished. It has a prometheus inside and I'm still waiting for firmware update to finish it.
I found that I could make use of aluminum flat bar to stabilize parts, mount fans, and secure in general. It's easy to shape and drill and strong enough.
For my accelerators, I used plastic bolts and nuts that I got from local hardware stores to keep the boards from coming loose.
Both ATX and AT conversions needed a power supply adapter for the motherboard.
Biggest thing... Spend a lot of time thinking measuring planning before cutting.
