Plastic Drum Plug Adapter - Now with floater!

Original design was not strong enough because I didn't print it 100% infill as recommended, but also the geometry is less shear resistant than a "grip" with more perimeter (e.g. square or hexagon).

My drums had been left untouched for more than two years and the plugs are really though to remove (3 out of 6 removed with original design + 4 screws vertically through the part)

So I inspired myself from the PVC plug fittings that have square heads. Additionally, to add more strength to the