:thumbsup: Dito!! Except I use all 3/8" spacers. Look/measure a standard Lang. frame 1" bar w/3/16" side extension or 3/8" between topbars. Also; I make my TBHs to accept a standard Lang. frame or box if you want to super.I use 1" bars with 1/4 or 3/8ths spacers, depending on where the bars are located [brood or honey].