Twin Track bracket for bin box rail

I wanted to mount a rail to my Rubbermaid Twin Track that I could use for hanging plastic bin boxes and this is what I came up with. The brackets slide into the Twin Track and hold a piece of 1-3/8" x 1/16" steel slotted flat that the bins can hang from. I have no idea how much weight it can hold, but it seems solid enough for my needs.

A future upgrade might be to put a hole in the front face that a peg or screw could go through to lock the steel bar in place.

PRINT ORIENTATION:
For ma