* Though now that I think of it, if it had, in fact, been somewhere where it would show, I could buy a plug to fill it such that it would be less obvious. Actually, I may do that anyway for the holes I drilled in the case, which will show, at least in one of them.
Adding to my sense of unease was the fact that I also added some plastic glides to the bottom of the cases, such that now they don't sit level on the floor unless I stick some sort of shim under one of them.** They seemed fine before, but now I wonder why they aren't as level or plumb as I thought they were. Maybe I should get some adjustable ones.
** If these were to be built-ins, I wouldn't bother with the glides. I'd just use strategically placed shims to get everything plumb and level, but since these are to be free-standing, they ought to have them.