I’ve found a nice way to secure 1/2” panels to 15 series. I’m using bamboo plywood, and using the 1/2” for some of the side panels that I’m attaching other things to, usually screwing on things on the inside.
This puts the 1/2” panel ever so slightly inset from the outside of the 80/20.
I cut some 1/4” ply in 1.5” strips, and beveled one edge -
Then, I inserted some foam caulk rod into the channel of the 80/20. I used the type labeled for small for small gaps.
I then wedged in the 1/4” ply strips so that the foam rod was on the side of the gap away from the panel, and the ply strips were angled into the cabinet.
I then put in the 1/2” panel, and screwed the 1/4” ply to the 1/2 panel with 3/4” truss head screws. You could use pan heads as well; the truss heads didn’t protrude. I was going to get pan heads later, but went with the truss heads on hand.
The end result is a panel that is held in very securely, doesn’t rattle, and is easily removed for access/refinishing/etc. One could glue the 1/4” ply to the 1/2” if you wanted something more permanent.
Cheers,
Greg