This is designed for use when adding dual z axis rods to the ender 3 max. You will need 8 m4 bolts and t nuts for the relocation kit. To mount the psu to the rear extrusion you will need to pass the bolt through the vent slot near the green LED in your PSU and add a t nut on the back.
No supports should be needed if you have bridging on. All parts printed in PLA, no issues so far being under the bed at 80 degrees.
Print the power plug with the flat base to the bed