Elan, I think the MR-12, Titan and Trieste all use the same module in the first stage, so the rebuild kit should work for both stages. Here is the photo I was looking for, which shows me using a Trieste II with the MR-12 octo in about 1975 or so.
The manifold you are looking for is a Sherwood, twin tank valve with a post on it for a second regulator.
There happens to be one on E-Bay right now too:
Sherwood 3 4 in Manifold K Double 2 Regulators Cave Diving | eBay
John
The manifold you are looking for is a Sherwood, twin tank valve with a post on it for a second regulator.
There happens to be one on E-Bay right now too:
Sherwood 3 4 in Manifold K Double 2 Regulators Cave Diving | eBay
John