Over the years I've had a bunch of the Huot metal drill indexes. It always drove me nuts that sometimes I'd go to put a bit away and it would get stuck partway down, or I couldn't get it to go in the lower hole. Occasionally I would even have a bit of a tantrum and hammer the bit in there, bending the holes. I'd be like "why the heck do they make these stupid holes so small". Of course that's sort of the point of the index - to make you put the appropriate bit back in the appropriate hole. And why won't it go back in? Am I in too big a hurry to take my time and line it up? If so, why? Usually the culprit is a small burr on the side of the bit that's hanging things up. So I need to learn to file it off before returning the bit. And I also need to learn to tighten my chuck properly so the bit doesn't slip and turn up a burr. Or maybe I need to use a different drill with a different chuck for that size bit in that particular material - like one that uses a chuck key instead of just a hand tightener. Or maybe my technique or drill speed was wrong...
In any event, I just hammered a drill bit back into my drill index worked like a charm.
JP