DrMaddVibe --- don't you think that it wouldn't be an issue if your humidor was properly humidified?
... after all, the foot (on most cigars) is trimmed, so what difference would it make if the cap was also cut?
I've cut the cap on quite a few cigars over the years, and ended up having to put them back, and then not being able to get back to them for quite some time ... and I haven't noticed any difference or ill effects.