Buoyancy or lack there of new Jet Fins

[Ulfhedinn]

Trying to dial in my new dry suit. Picked up the new White XXL Jet Fins as all of my other older Jet Fins did not fit. I now officially have every size they have ever made.

I'm thinking neg -2lbs per fin but then again...

Any ideas?

 

[Subcooled]

I'm thinking neg -2lbs per fin but then again...

Bigger boots, thus more air in them, thus better insulation, thus warmer toes, thus less pain and less riks of DCS in the foot.
Also more buoyancy and heavier fins. Will you notice a difference?
Does this affect long swims?

There are two XL sizes, old and new. How big a difference in negativity?

Can you test the fins prior to purchase?