I am looking at a friend’s regulator that he has used for 20 years or more, it is a Abysmal first stage with KM super flow second stage. My question is can the first stage be rebuilt with Poseidon parts? From what I have found on line the first stage was a copy of the Poseidon, the company went out of buss. in 2003 and I cannot find out any more info about it, the second stage parts can be gotten from KM. Thanks for your help!