Corner supports fit firm with notches on top for double sided tape(heavy duty 0.07"thick) and on the sides for magnets(60mmx10mmx3-5mm).  Panels may need to be adjust for your machine(mine wasn't square).  They include notches for the same magnets.  I put vents on the right and front panels of mine to allow air to pull through/across via the vent fan.  The panels have slightly more height to adjust for none slip pads on corner supports.  Honeycomb supports are to raise the honeycomb to reach a workable height for thin material.

I printed with 4 walls, 5 top and 4 bottom for strength on corners supports.  Used the cut tool in the slicer to fit the panels.  Used about 2 spools of filament.  About $50 for everything with filament, magnets, tape, pads.