Stu, the 15l are heavier when full but they are actually lighter in the water than 12l when empty or almost empty. When you breath the bigger tanks down you lose more weight than with the 12l tanks, so you actually do need more weight with the bigger tank. Look it up if you don't believe me or try it out.With heavier steel tanks (15l+) I would need less weight not more, so by your own reasoning, that would make for a better profile, not a worse one!
gearhound, the guy was asking for sm rigs so it's not that far off topic.
If I was married I wouldn't have to lie about what 30 cm are, ey?
I should have said earlier that I have a 'Edd mod' sms, I have actually never used a stock one but I can see why they would stink.
Now that I've seen your video I get what your saying. I never used US hp tanks but I assume they stay negatively buoyant when empty and that's why you don't need the double layer of weight of the large weight system.
Here, in the baltic sea, people need 14kg+ and use that large xdeep weight pocket. So when they need to put a bunch of gas into the wing their profile is worse than that in your video and in that case the modded hollis really does better when you put the weight under the bp.
I guess it depends on what kind of tanks you have access to.
Is that video from somewhere around Calgary?
@tbone, ok, sorry.