See if I can remember your quesitons. Yes I feel confident your 13 inch bass are from several year classes of fish. Also I would not say 20 lbs/ac is for trophy bass. It is for anyone already bass heavy. While I can tell you have done some serious work with the removal of 1400 bass, this is not enough. I suggest more than double this amount next year. You have to correct an out of balnce situation. Once in balance then taking out 1400/year should work. You might want to get local biologist with shock equipment to help with removal.

About crapie, I agree you have enough bass to keep them in check. However they take away more food they they provide. More like a bass than a bluegill so will not help bass growth.

Feeders... I'm biased b/c I quit selling Sweeney a few years back and exclusive sell Stren fish feeders. Main reason was was longer warranty (4 yr) and better price for client and profit for me. BTW Remington and Stren are the same, just slap a Remington label and you have a wildlife feeder. 80 acres would be quite costly to fertilize. How much flow do you have, good alkalinity, few weeds? If setup right for fertilization good option. Setting 5 feeders would only get you started on a lake of this size and compared to fertilization more expensive. However it directly works. It might be worth tyring some to see if bass catch rates are beter around feeder trying to get a bluegill snack. Hope this helped, Gotta run.

Greg Grimes
www.lakework.com