Adapting a 1.1L Cylinder

I just saw this on the Huben Power web site
External adjustment, have to drain the cylinder to adjust down.

It appears to offset the cylinder which should allow using cylinders with larger diameters like 86mm 1.1L
CF 1.1L are actually cheaper than 0.7L CF cylinders

It looks like you would need to remove the barrel to mount the regulator.
Have to fabricate at least 1 barrel band too.