Al backplate weight

[2Dogs]

I've posed this question on an Aussie forum and have received a number of differing responses so I figured I check with the learned STF members (note: major suck up here ie: )

Anyone know what weight I should assume for a Halcyon Aluminum backplate (rigged) underwater? I currently allow 6lb for my SS B/P but have no idea what to assume for the new Ally plate.

[cummings66]

The Halcyon AL backplate is 2.2 lbs, that's the plate only. The Halcyon steel backplate is 6 lbs, that's the plate only. Your difference is about 4 lbs. But you could say it's 3.8 lbs if you want but the difference is minor. The harness and D rings aren't normally counted in the weight as it's so little, but I think I saw somewhere that it's about a pound. Without knowing what your current backplate is I'm guessing at the 6 lbs, my DSS plate is less than that and the Halcyon is more as I posted above. There are other brands too, but most seem to hover between 5 and 6 lbs, and al plates seem to fall in the 1 to 2 lb range.

[CompuDude]

I, also, figure about a 4 lb weight reduction going from a SS plate to Al.

[texdiveguy]

My Zeagle SS plate wts. 'about' 5.5lbs.,,,my Zeagle Al plate in the range of 1.5lbs..

[frogman159]

OMS is 2 lbs

[2Dogs]

Looks like there's a consistent theme here (thank goodness) which matches the response from Halcyon received overnight.
"For the Al backplate underwater it would be the same as on land - approximately 2 lbs."
&
"With your STA and such on the aluminum plate, 4 lbs. Your SS plate alone is just under 6 lbs, with the STA it's almost 8 pounds"

[cummings66]

It wasn't that way on the other site? I'd forgot about the STA, I don't need one with doubles but Halcyon didn't overlook it.