Quote: (Originally Posted by
chunter)

I don't know how well the composite spheres work with hard plumbing or if you can use them on Mark 15.5s and 16s. Is there any reason you couldn't put pillar valves on the composite tanks? Do you know what the dimensions of the composite spheres are?
You recently bought a MK15.5 correct ? Then the composite spheres should fit. The only person I know has a MK-16 is KJ.
When I had my MK-15, I had the reg changed out to Apeks-DIN and used DIN spheres. See pic...