Now that I have changed to a more compact gear (Nauticam housing for OM-D EM-5), I find my Stix large&jumbo floats unsufficient: I am still far from neutral, and I don't have much remaining room on my ULCS basic arms.
Several brands now offer buoyancy arms that are empty on the inside (ULCS, Inon, Nauticam...), and I'd need your advice to pick the right one.
What I've read on the Nauticams sounded good: made of carbon fibre for even smaller density, very robust etc. etc.
Your advice on quality & cost effectiveness would be very welcome