Padlock MicroSafe

I had a "bright" idea... ...which suddenly required some kind of small container that could be locked with a key. Hence my PadlockMicroSafe, or PadlockMicroVault. A very simple design consisting of a small box and a lid for said box. both parts (hopefully) fit into and between the shackle and body of a standard 40mm padlock measuring 24mm x 22mm (hxw) inside the locked shackle.

edit: Added two more fancy looking versions. (all before checking that the first one fits...) I also realised that the small compartment could hardly fit a key... So, might make some radically different versions as well. I don't want to have too long of a box sticking out perpendicular to the padlock, i think...

edit2: Well, i got the size of my padlock wrong. I uploaded some pictures including measuring the printed part. the thickness (diameter) of the shackle in the model is 6,5mm.

edit3: Redesigned according to the padlock i had, which has the internal measurements within the locked shackle (hmax x