buoyancy arms

So what do you guys think about the buoyancy you need to aim for? like how close to neutral is close? 10g? 50g? 100g? 200g? My current rig dry weight 4kg. -With lens A in fresh water is around 1030g -With lens B in fresh water is around 880g So I was thinking to get A) 1x400g (8cm x 5"...

Ultralight Control Systems is one of the lightest weight and most reliable arm systems on the market. An o-ring in each ball joint increases the friction forces at the joint, keeping the arms where you put them, while minimizing the metal to metal contact between the clamp and 1” balls. $70 for...