Well, just did my 4th trip to the pool. I'm still barely crawling & been using the pool time to practice the very basic skills I've been shown. Overall buoyancy control hasn't been awful,... not perfect,... but not crashing or anything. Ascents are slow & controlled. Trim is a little weird, as 1 minute I am feet heavy, the next I'm standing on my head. I'm guessing it is due to changing loop volume, that's the only thing that had changed. I am trying to maintain minimal loop volume, but in a shallow pool, it is difficult with the constant injection of oxygen to maintain set point.