I honestly don't think this "EMV" stat you're trying to establish will be all that useful..
Things like drag and diffusion are way more important IMO...
For example, I have a möbius clear matrix and reti.
They are supposed to have the exact same form factor, yet my reti is maybe 0.5-1cm taller than the matrix.
(Some quick maths:
75mm can - (5mm wall x2) = 65mm internal diameter =32.5mm=3.25cm internal radius
Area = Pi r2 = 33.18cm2
33.18cm2 x 0.5cm = 16.59cm3
33.18cm2 x 1cm = 33.18cm3
So right there, we have a "EMV" variance of 16-35cm3 between 2 pieces that should be identical.
Then factor in that you can vary water levels quite a bit (let's say 3cm so we can do some more fun maths
![Wink ;) ;)](/i/s/wink.gif)
)
33.18cm2 x 3cm = 99.54cm3
So if you add the water level variance and the variance from the pieces themselves, you can be varying by up to 130cm3...
Now, going by a graphic in the mobius thread, the can on a clear is approx 6inches = 15cm tall.
Assuming a minimum fill of 5cm, that would leave you with an "EMV" (just for the can, not factoring in the neck) of
33.18cm2 x 10cm = 331.8cm3
So you've got a potential 10% difference just based on the shape of the piece coming out of the factory, and another potential 30% variance based on personal preference of water level...
It just seems too wishy washy to me...
I'm not saying you should give up on the idea, just throwing my
![Two Cents :2c: :2c:](/i/s/2c.gif)
out there...