Here's the top scrim piece, the face pointing up will be in contact with the 'Sorb.
The bottom piece and assembly (bottom lid, including the bottom scrim the locator tube) should be done tomorrow. That leaves me with potting up a head board and assembling this beast - she's basically ready to start dry testing at that point!
I'm sure I'll run into some "Oh !$#@!!s", but right now things are looking awfully good.....
The frame is made out of 1/4" HDPE, cut with a scroll saw and drilled with an ordinary drill press. Nothing fancy. The actual mesh material is from
Industrial Supply, Metal Balls, and is a polyethylene mesh material that is quite strong and stiff. It is secured with six small stainless steel screws, so it is easily replaced. Its reasonably cheap - $20 buys enough to make a more than a half-dozen "faces" and leaves enough for a few mistakes as well. The easiest way to make a new one is to screw it down and then invert it and take a razor blade to the periphery.
A piece of polyethylene fabric (aka Inspiration) goes over the sorb, then this piece goes on the guide rod. A spring goes down the rod and is compressed to expose the locking pin hole, into which the pin is inserted. This keeps the top piece pressurized against the 'Sorb, and the fabric prevents any dust from getting through towards the inhale side.
On the bottom is another one of these, but with three 1/4" bolt holes for a triangular pattern bolt-up that holds it in place above the inlet and properly horizontal. The locator tube is attached to the bottom piece and is sealed at the bottom. The locator tube is open at the top so a suitable implement (screwdriver, etc) can be inserted into its bore to guide it into the top piece as the can is being packed. I intend to put two holes in the guide tube - one for a "full load" of 'Sorb and a second for a 'Half load' for use when you intend to do only a couple of recreational dives in a day, and don't want to load up a full load of rocks.
