Trying a Snap Buckle
Fleetingfrom https://www.thingiverse.com/thing:5762950
The support was very hard to remove.
I needed to replace the one of my back pack that broke
I tried this one
https://makerworld.com/en/models/819280-strong-printable-snap-buckle#profileId-762092
I needed a 40mm buckle.
I took the 3.2cm, rotated the female by 90°, then scaled up to 110% on the X axis.
Then, to make the female part fit, I needed a strap buckle.
I tried https://makerworld.com/en/models/1980259-belt-strap-clip-38mm-thin-and-thick
But it did not work very well
Then I tried https://makerworld.com/en/models/669780-strap-adjuster-buckle-25mm
With 160% scale in X