Universal Audio Apollo X4 Riser

This is a riser for the Universal Audio Apollo X4 audio interfaceThe parts are built with a 3mm tolerances, and the cross beams and risers have holes for m3 heat inserts in the crossbeams and m3*12 screws and washers in the sides of the riser. Though tolerances are tight enough that if you want to forego the screw and threaded inserts, the parts will hold themselves together with friction relatively well. There are no screws or clips holding the audio interface to the part, the feet of the X4 fit into the holes on the risers tight enough to hold the riser onto the X4.This is my first time creating my own part with CAD. If there's suggestions, or improvements you'd like to see let me know.