How big are your SMB / YP / RES in your mature 2007 pond?
I have caught SMB up to 17" and YP up to 13". Most "big" SMB are around 12'-13", most "big" YP are 11"-12".
Due to stocking male-only BG and the apparently relatively loose sexual mores of RES females, the sunfish in the pond are mostly BGxRES of various Fx generations. Growing them big is what I have concentrated on. The current record is 13 1/4" long, 2 lbs 8 3/4 oz.