Im playing with making my own leather holsters, I’d like to make a leather flap holster and I’m interested in using a magnet as a closure method. I imagine it will be silent opening and closing, great while hunting. Im a little confused on magnet types. I plan to glue and sew it into a pocket of the leather, and I don’t know what strength or size magnets to use. I’ve been looking at heavy duty rare earth magnets but maybe that is overkill? Thanks!