A little more progress, 'cuz I know y'all like pictures
These things are going to weigh something close to 160 lbs when done, so they're getting ball transfer casters to make moving a little easier.
Close up of caster mounting
Grill frames machined and attaching neo magnets installed. Assembly is mocked up before take apart to prep for painting.
Close-up of grill intersecting side. I needed to use a thick grill frame and sink driver into cabinet to accomodate max excursion. Didn't want to make sides, top and bottom any deeper I tapered grill with same radius that's on the sides.
Here's closeup of grill edge showing taper and back rabbet for grill cloth. Rabbeting for cloth avoids inevitable corner bunching of fabric that keeps grill from sitting flat on cabinet.