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John
       Hope you had a safe trip home. It's nice to talk face to face - even if
it is only once a year.

As regards current Poseidon regulators etc - speaking as a service tech. the
position in the UK is as follows. The 'Oceanair' was discontinued a couple of
years ago - for those who remember it had the original cyclon 1st stage and the
servo jetstream 2nd stage (12.5 bar interstage pressure). This was nver replaced
in the range which was then down to 3, namely the Cyclon,Jetsream + Divair
(5000). The Jetsteam and 5000 shared the same 1st stage with 2 major differences
(1) the 5000 ran 12.5bar interstage pressure AND had a restrictor fitted to
reduce airflow thro the 1st stage since the cyclon design of second stage in a
freeflow situation may not be able to be stopped due to the volume of gas
flowing thro.

These 3 regs were the entire poseidon range for a couple of years and saw a
change in first stage body on the jetsream/5000. Shortly after the cyclon was
dropped leaving just two models - jetstream + 5000. Prior to the announcement of
the Triton the 1st stage body changed again to the new shorter round body
(designated 3690) and incorporated a safety valve. Shortly after the Triton was
announced and never formally released due to problems with a component in the
second stage. Re-release is imminent.
The range as far as poseidon see it is complete again.They feel that the deep
reg choice is jetstream, advanced use reg is 5000 , and conventional
recreational reg is the Triton.

Bill Dyer covered the in-field setting up just about except ommited to mention
that the interstage pressure must be initially set on a cylinder pressure of
20-30 bar.

Before I forget John we spoke about OMS M25 thread isolation manifolds. Any idea
of cost and what is the centre distance?

Regards

Chris

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