The cold water kit may or may not have fluid under it. The old ones did, but the later ones used a plastic piston instead of the fluid. In any case unless you dive cold water, it is optional It looks better with a standard Conshelf cap but you can just remove the second diaphragm and fluid/piston and use it as is.
I sure hope the person at the LDS that didn't know what the 1/2 LP port was for was just a sales person and not a reg tech....if he was, get the reg back and find a new shop.
I sure hope the person at the LDS that didn't know what the 1/2 LP port was for was just a sales person and not a reg tech....if he was, get the reg back and find a new shop.