Hello, I have only one top bar hive I started in late May. They have drawn out about 14 bars of comb and I do see capped honey. My question is I only have two 3/4 inch holes for an entrance. Should I add more holes for them? My hive is 4 ft long with 15 inch bars, it just seems like its crowded at the entrance and like they have slowed down building comb. Thanks for any help.