You know those ugly plugs on the side of the reg. housing where the gauges go? I was at the dive shop getting my tank filled and ask if they had somthing to put in thier place. He gave me 2 chrome allen head plugs to replace them with. They have rubber o-rings on them, with flat allen heads. They look like they were made for the Timmy, no more rusted plugs!
I go there about twice a month and he just gave them to me. (must not be that expensive)
On a side note, he only charges 3 bucks for a full 4500 fill.
The plugs are threaded for standard 1/8" NPT (national pipe threads).
You can get stainless plugs just like the ones that are in there that won't rust.
The ones you are talking about sound pretty cool, tho.
Voider of Warranties
Healer of Unicorns
Petty Paintball - www.pettypb.com