May I help. Long before I got into teaching SCUBA I taught swimming, lifesaving, etc. No weights, just a body with a swim suit. One of the requirements was floating for a period of time. During that period of time I discovered that life doesn't always follow norms. One of those norms being preached here is identical people of same weight and height float at the same level. Not true. Some sink to just a nose, others float with almost all the head out, and a whole lot in between. When I got into SCUBA I would council people as to were to start with weights and adjust from there. All the book learning in the world is not a substitute for the real world. The other thing floated about here is comfort level. Again, that is the real world talking. If you want a couple of extra pounds for whatever reason for your comfort go for it. Maybe your BC has a little pocket that is not easy to deflate. Whatever. Book learning and school learning are great, but just a complement to real world obtained knowledge.