Practicing in Capers yesterday with a couple from my BSAC club - still work to get really comfortable in the dry suit but better on the second dive when I dropped 2kg to 9kg. The leader decided to teach me how I should control my buoyancy, got me to empty the BCD and put three clicks on the autodump (all underwater!). This got me thoroughly confused but I understood after a while. We discussed it after the dive and his view was that most UK divers use the suit for buoyancy. I've been back at old threads and read Nigel Hewitt's rant on the subject - these go the other way, with the suit for squeeze or alternative buoyancy if you have a BCD problem. As I'm intending to move to a wing, I've been investigating - it seems clear that the bladder is intended to buoyancy control, not surface buoyancy only!