Just an update, I dove at (nearly) the same site yesterday, but added a few pounds...what a difference. Yes, I'm more negative at the start, but near the end it makes all the difference. I could easily hold 15', 10' on a near empty tank (500psi), and after the dive, could decend without any major effort. It's just a bit more effort at the start of the dive to manage my buoyancy, but it's worth it to not be fighting to stay down near the end.
Thanks to everyone for the tips! Definitely a work in progress though.
Thanks to everyone for the tips! Definitely a work in progress though.