How to locate the optimal height for sidemount cylinder bands

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Yeah....the sliding during thing is a waste. I do have the Stealth O-rings on my rig for AL tanks but all the other ones available are pretty much sitting on a drawer in my shop....good for not much.
 
I thought this might be helpful for some sidemount divers.

How to locate the optimal height for sidemount cylinder bands for loop bungees:

How to find the Optimal Height for Sidemount Cylinder Bands

I get the first point how to measure the from the armpit down to the mid-point of the waist belt, but second point I cant understand.

What does "distance down from the top of the tank valve" exactly mean? It it the maximum top or the center of the exhaust hole where the air comes out?!
 
I get the first point how to measure the from the armpit down to the mid-point of the waist belt, but second point I cant understand.

What does "distance down from the top of the tank valve" exactly mean? It it the maximum top or the center of the exhaust hole where the air comes out?!

from the center of the valve knob which is where the bungee is going to attach.
 
It depends entirely on your bungee method and tank material.

Loop bungees only really work well when the cylinders are out onto waist D-rings. That counters the torque given by the loops and keeps them trimmed.

That's true for either steel or Ali cylinders.

If using continuous or independent bungees, it all comes down to cylinder material:

- Aluminium goes to the waistbelt, so you can move it - rear to front D-ring - to counter cylinder buoyancy.

- Steel can go on a buttplate. But it's also workable with waist D-rings.

If using ring bungees, only with steel cylinders, it'd go on the buttplate.

If using steel cylinders, the choice of using the buttplate can be especially beneficial if you're of short height, or you have a sidemount BCD that isn't adjustable for spine length - it allows you to keep the cylinder bands lower.
 
How about 240bar high-pressure aluminium tanks, that stay fairly negative? I assume they would also be okay to attach to either waist D, or a butt plate, just wondering what the etiquette would be for them?
 

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