Here's a HSW hook with a hinge that can fold out of the way. It is print-in-place with several tolerances to choose from. I have also include 2 types of inserts for your desired secureness. Optional fillers are also available if you prefer not to see the gap on the sides.

Once printed, use force to loosen the hinge. Keep you fingers close to the hinge while doing this. Determine which tolerance works best for your printer/filament.

Place into any open HSW insert

Optionally, add the filler piece before inserting. (Warning – adding the filler piece makes it a tighter fit and is difficult to remove)

Additional hook sizes are available upon request.

Enjoy!