STAs and What size wing for BP?

[fishchaser]

Sorry to beat a dead horse...but I visited an LDS today. Of course he doesn't sell wings, so he lead me to something he does sell...a Genesis Recon, with a 75 pound bag! He claims that if I get only a 30-ish pound lift whatever, that I will have severe problems with lift at depth (100') due wet/drysuit compression, losing that bouyancy, especially if I dive with around 30# of lead (which I believe I would, as he does, and I used 35# with 7mm wet). He claims that with that much lead, the 30-35# bag won't cut it. That sounds contrary to everything I've heard/read so far, including from the wing manufacturers. What gives? (And no, I don't think he was in it strictly for the sale...I think he really believed that you need no less than 45# of lift, sale or not.)