HSB are not known to be major predators of lepomis (BG, RES, SBS etc) as shown in several studies. Obviously the larger the SBS are in comparison to the HSB the less potential for predation. If you can get SBS that are twice the gape limit of the HSB you will be good to go. If you are feeding the HSB and there are FH and GSH present, then predation by HSB on SBS should be minor even on small SBS.