The sorb's dry -- OK, damp due to the chemical reaction producing water. As both cannisters are 'up', no water can flow into the sorb (short of a full flood).
The cover's easy enough to seat. You first run your fingers around both sets of O-rings for hair or suchlike. They should be lightly greased as with the inside of the cover (I do this once every 20ish builds or when it's getting dry). The cover does need pressure at both ends to seat, otherwise it'll see-saw, one side down the other pops up. Not hard though.
I -- against the build instructions -- add a half cloth to the exhale lung... You may or may not know that the Revo has a square yellow absorbant cloth that's about 30cm/12" square which is rolled up and placed in the bottom inhale lung. This is to absorb any free-water that makes it into the inhale lung. Problem is it doesn't particularly end up there, the issue is the exhale lung when loose lips or poor mouthpiece replacement dribbles a little water into the exhale lung. If you're flat in the water this ends up back in the loop and gurgling as you exhale. Too much and it can end up in the mouthpiece.
I don't like that, so have cut a cloth in half and roll it into a 15cm/6" long roll and stuff this under the exhale connector behind the cables. It nicely stays there and will absorb enough odd drips of water to stop the annoyance.
My favourite things about the Revo include the two scrubbers which basically mean you never change both scrubbers (except an exceptionally long dive -- never needed to myself), one scrubber's half the size of all other rebreathers. I like the fully redundant electronics meaning the Petrel controller with 3 cells and the Nerd backup monitor with two cells of its own -- so cell worries are much less and replacements can be less frequent than systems with 3 cells. I like the simplicity of the loop, only two hoses and no attached lung T-pieces. The scrubber monitoring system works really well with a simple duration to read. I like the lungs being so accessible so you can clean out the lung butter without a hosepipe. I like that there's no special tools required to maintain it.
Just returned from a week's simple reef diving off of Africa with the Revo. Such a great design and so flexible. Why people actually choose to blow bubbles beats me.
