In case of the Razor it works a little different in my opinion.Even your beloved Razor uses bungee which can influence wing volume. That's what happens when you bungee around the torso. But the bungee does not limit the max buoyancy when you need it. The bungee would get tight around the stomach if the wing was fully inflated, but the wing would inflate. Correct?. The OPV wouldn't burp until max wing capacity was reached.
The bungee presses the wing against body and weight system edges.
Those restrict wing inflation but the bungee is neither thick nor very tight.
But the bungee in this case could also be webbing, or a steel chain, the bungee-flexibility effect is next to nothing on the BAT-wing.
Some make the mistake of thinking they have to strap it tightly to their body, that will make the overpressure valve react long before the wing reaches max capacity.
In my early experiments I could loose about 5 kilograms of buoyancy that way, today I loose none at all.
I had mentioned that I personally do not think it restricts the wing very much....This, however, still preserves sufficient flexibility in the bungee to permit full inflation of the wing (as supplied, the bungees are very loose).
The bungee will however increase the pressure you need from the inflator to inflate it to maximum, slow it's expansion - that is the idea in using it in the first place.
That sounds reasonable.I then demonstrate how the wing capacity can be reduced by tightening the bungee much further, so that the bungee reaches it's maximum stretch before full wing inflation is achieved. Reducing wing capacity is the goal, and you have to more than double the stretch/pre-tension on the bungee, (relative to how it was rigged 'out of the box') to make that capacity reduction.
So what's your problem with what I am saying.
Most people will neither have you nor Edd to modifiy their Hollis.