At this time I'd hold off on adding more LMB. It is a good possibility that there are too many places for the little BG to hide from the LMB. I agree with the creel survey. Lengths, weights (weighed, not estimated) and species of fish. Usually you don't want cover for the fish to hide in to be more than 20% of the surface area of a pond.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).