going to make the switch to top bar hives. planning ahead for this winter's building projects. I use screened bottom boards (SBB) and inner covers in my Lang's, and like it for the summer swelter. I see designs for TBH with and without SBB. I know what the weather is like in Kenya's Summer. Doubt they use SBB. How 'bout the TBH Beeks here in the states? All input appreciated.