Dave Willis had a graval pit project with small mouth and pumpkin seeds.
Pumpkins reproduce much faster than RES but I dont know how they compare to BG. I talked to him about a bond I was putting together with RES and Small mouth and he liked the idea of adding perch. This pond is eventually getting walleye too.

"No they have a small mouth gape just like BG" which fish are you taking about? LMB SMB RES YP or your redbreasts?

comparativily dont YP have a larger mouth gape than BG?

Water is the basis of all life, by design!