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William,

Since there are no other replies, here goes:	


a) do we need a swivel for the 1st stage ? i personally dun think so , but i

might be wrong

NO - The DIN fitting works as your "swivel" to get the 1st stage at the
angle for hose routing, etc so a swivel is another failure point. Once
tightened down you don't want the first stage or hoses moving from where you
put them.


b) is it ok , advisble or a BIG NO to instal swivels to the 2nd stages ? if 
yes  , do we install to both 2nd stages ,( the one to the 2.1m hosae and the

one round the neck ) or just to one of them ?

NO - This is a failure point you don't need. With proper hose routing of
behind the head with the primary & stages or a short hose on the backup it
is not necessary anyway.


c) have this weight problem...i dive wet most of the time. i'm from asia , 
so even if we do tek dives ( simple ones !! )  , would at most require a 
semi-dry suit.
now i only need 6pounds of lead to sink when diving with al 80s. however if 
i were to get a ss backplate , the weight itself would be sufficient for me 
to sink. But this means that i cant dump these in cases of emergency as 
well. i feel that ss plates are much better for saltwater and harsh 
environemnt conditions, thus i have this problems on wieghts now .


On this one we need more information. an AL80 is +4 lbs when empty and the
buoyancy on any sort of wetsuit needs a lot more weight unless you have
other equipment on that sinks. Let us know more about your gear setup to see
what is acting as weight for a better idea of what you should do. Generally
though, with wetsuits you dive with an aluminum backplate so that you do
have some droppable weight to aid in getting to the surface if need be.

Don
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