thanks for the info! i think what ive decided to do is get some thin wood shims and affix those to the inside of the suitcase sides with the 2 part JB Weld compound, screw the rack rails into those shims, then drill a hole in the backside of the case large enough for a power cord to easily fit through (maybe glue a rubber gasket around the hole to keep it from degrading the power cord over time, then screw my power supply onto the rack and modules and i think that should do it!

“You’ve got so many machines Richard!”