I built my Z trap to catch the little ones. IIRC, the slots are 3/4"x4"-ish. Mesh size is 1/4". 4" BG is about the biggest that it will catch. It also gets plenty of sub-6" YP, FHM, and GSH. No bait required. Just soak it.
My strategy of "managing around" the BG is to remove as many small ones as I can by trapping, and let the ones that get away turn into whoppers for the grandkids to catch on R&R.
