I made an adjustable holder for my watches, so that I can compensate small differences in diameter of the strap.
It is designed with small teeth, so you can adjust it after you put your watch on it. That makes it easier to find the correct dimension. If it doesn't fit your watches, just scale the whole thing up or down ;-)
The design is a remix of thing:3053563.
I designed a small modular platform, so that you can arrange your watches on your cupboard evenly. It is shaped like a puzzle piece, so you can add more watches whenever you want.
The existing watch stand does not need to be glued into the platform, just put it in.
Colorfabb PETG (nGen)
I used a small Brim to fight slight warping.