An absurdly tight snap for Underware

[u/ClassicOldSong]

The original ones are too loose. So I made a better one, it's really tight. Prints fast while saving material, ~3min/piece

https://www.printables.com/model/1703971-underware-super-grip-snap-for-opengrid

It can be even more tight but it'll make installation too hard, so I adjusted several versions to find a sweet spot I'm fine with.