I think it makes a lot of sense, Norm. If your goal is crappie and you don't want much LMB recruitment, then I think your idea would work very well for a pond owner who could stay on top of fish sizes and numbers.
The only problem I see is that when you want LMB AND crappie in a smaller pond and want both to reproduce, the juggling act of predators gets tougher. Stocking only adult LMB, not to mention only females, could also be a tough chore in some areas.
All that being said, you may be on to something. I think if someone has a smaller pond they would like to devote to crappie (with a few good-sized female LMB for fun), they could to tremendous things with your idea.
