I printed these in PETG with .2 layer height, 15% infill, 5 walls, and support (blocked support on the screw holes).

RPi_2U_19_Rack_Tube_End1.stl & RPi_2U_19_Rack_Tube_End2.stl can be imported into slicer one item, but two objects to allow for different print settings between the two items, if desired. These two parts make the same part as RPi_2U_19_Rack_Tube_End.stl.

To make the “tube” (bars) you will need 2 End pieces and 1 Center piece.

For the SSD mount, you will need a Secure_1 & a Secure_2 for each slot.