George,
My strongest congrats! Outstanding job!
And I think you are completely right about the Tilapia in the grow-out pond to provide the forage and control the algae. Its what I am doing also.
Can not wait until fall to begin catching what look to be 3 to 4 pound HSB in main pond. Never expected to have so much fun as it is to try new things. They don't always work, sometimes the failures can be painful, but when it works, man what a feeling.
Way to go George!