You should deal with a dive shop that does a lot of tec. diving. I am also 6’3", 240lb with a dry suit. And dive with drysuit/ dbles OMS LP 2400psi 85c/ft. Extra weight to the dbles you didn’t knock off enough lead with to much air moving around in your drysuit to your feet. Drop 10lbs of lead before you change anything else.Get some pool practice with the drysuit/dbles on. Include your line reels,extra bottles,lights and everything else. If that isn’t your problem then re adjust the back plate to the bladder. Then get back into the pool. Lastly you’ll have to drain your tanks completely and readjust the bands to the tank. Re tighten the bands then a partial fill. And then do another pool practice session. You may also have to re adjust all 3 parts of the dbles. system. FYI dbles are easier to dive with then a single alum. 80. If your in the midwest Chgo. area I would love to purchase those dbles. LP you mean 2400psi/95cu.ft. correct ??