Summary

Sick of hunting round the base of the cupboard under the sink for the roll of bin bags? I was.

No longer!

There's two versions of the boxy bit. One with text and cutouts and one without.

Instructions

PRINTING:
The bracket needs support "everywhere" for the T section of the dovetail. Print with reasonable infill (25% plus) to give sufficient strength when wiggling out the support material.
I printed at 0.15 layers, 25% infill, 0.8mm shell, 80mm/s traverse for both. No extra platform adhesion necessary.
The box prints on its base and needs "touching build plate" supports for the rear mount. Its a slight pain getting it out too, but not impossible.
FITTING:
Mount the bracket using your favorite screws and then slide the box down the T bar. Nice tight interference fit. Fill with stuff.

Cupboard Bin Bag/Whatever Holder