On a side note, when going from full 7mm, hood and gloves in FW to a 3mm shortie in salt, does anyone know roughly how much the 3mm shortie will offset my buoyancy from the full 7mm, hood and gloves? Couple, 3, 4 pounds I'm guessing? I'm trying to come up with a good estimate for a G. Cayman trip. To complicate matters I'm going from rental BC's (28# lead fw) to a new BP/W (FredT 9# SS, new oxycheq 45#wing. 2# on the STA's) so I'm told I may loose a few lbs. of "hidden" buoyancy that was in the BC (trapped air?) as compared to the BP/W.