Les, even on foundation-less frames I have noticed access holes build by bees on some frames. However in your unique, exclusive method these access holes has to be a thorn in your side. So: A what if question.
What if you were to drill, beside each of these rounds, a hole of adiquite bee 'access diameter, adding a clear plastic tube to line this hole, creating easy, built to go, access from side to side of the frame for the bees' use. I am thinking this might do it, 'hoping' this may satisfy the bees need for access, thus eliminating the access holes through the combs, while allowing access directly and jointly, 'against' these rounds as described.
Phillip