Hey There,

This is my simple but very sturdy under desk holder for mainly my DIN A4 sized paper and blocks.

You can glue (if you got really string one) or just use small screws to keep it in place under your desk.

Re size it to your needs - it should work regardless.

I printed it in PETG to avoid long term sagging - i have this mount now for over a month and lo sagging accured so far (see the pictures).

Have fun with it!