So I have had my tbhs now for two years and it seems that I always lack a harvest and even have to feed in the fall. My second year warre had a small harvest and my first year foundationless langs had a harvest. So what's the deal? I can't get my bees to build comb past about two thirds from the entrance. Maybe next year will be different, but after watching my warre and Lang outperform both of my tbhs...I am about to give up. I really love working my tbhs. The bees seem to be calmer and I squish much less bees, but maybe it's time to transfer bees over and convert the wooden ware.