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All good points. Thanks for the inputs. I wanted to do a pool session with just the two of us so I could check out his weight and buoyancy (different wetsuit, different BC, different regs, etc. than he trained with, but unfortunately the town he lives in (3+ hours away) will not allow divers to use their natatorium for scuba unless part of an "authorized scuba class". Supposedly some issue with insurance, risk, etc., and I did not have time to bring his to my city where I do have access to a great pool. So we will have to do the best weight checks possible on the first dive and adjust from there as the dives progress. I do plan to carry extra weight for him in case he needs it, as likely will the DM. My major beef with the scuba shop that certified him is that they really did not spend the appropriate amount of time doing accurate weight checks, and I think they probably had him over weighted, a common occurrence, so we will have to start with an estimate and work from there. For example, they had him (75#, wiry with no fat) at 6# with a 3mm suit in FW, 63cf AL tank. I could be wrong, but I think that was too much weight for him in FW. Thanks again for all the inputs.