Old thread and not trying to revive, just add info for future reference about what to do to glass over footstrap insert holes. What did I do? Nothing. Just glass over and when it cures you won't find any epoxy inside. For the first layer, I applied resin on the board, being careful not to go over the holes but around them. I put three layers of 4 oz glass. Let it cure and then made a hole with a small bit first and then with the same size as the hole, or just directly with the big drill bit (I didn't notice any difference between the two systems). I just finished drilling 30 holes and all of them were free of epoxy.
This was not my idea, the board lady doesn't say anything about filling the holes and the pics don't show anything either in her tutorial. It worked for me.