I designed this adjustable foot for my model railroad framework, but it is also usable for tables and other furnitures.
Press an M8 nut and bolt into the sockets and screw the mount with countersunk screws.
If necessary drill a hole into the leg.
Adjustable height with M8 x 30 bolt: 18...40 mm.
Measures: 32 x 32 mm
It may work with a lot less infill. Just wanted to be sure...