I've been playing on my new table and I've noticed there are "holes" under the cushions. What I mean, is I can run my fingers on the slate under the cushions and can feel depressions where the slate screws are. I assumed that when they used bondo/beeswax, they do the slate seams AND the holes where the slate is screwed in under the cushions. Or do they just leave them because the balls should never be able to touch that area as it's under the cushion.