Yea, I only had the camera on my cell phone so the quality is poor, but the trees and road were too pretty to pass up.
Today I adjusted the bump-stop for the nose of the differential since it was about 1/2" away from touching the differential itself. I think I probably mis-measured how far it needed to stick down towards the diff, and it probably pulled away further after adjusting the rear camber with the adjustable rear subframe mount, doing nothing to keep the nose from moving around. It went much more smoothly than I anticipated, just jacking up the back of the car, unscrewing the front of the rear subframe so that only a few threads were engaged, prying it down with a crow-bar, reaching up and in to get some vice-grips on the bump-stop to keep it from rotating, and then loosening it up from inside the car. I added enough washers to pre-load it a little (about 3/4" of washers), and reinstalled. Overall only about an hour & a half.
Since the back of the car was up in the air & I'd been noticing that when I fill up the tank, if its pretty low there will sometimes be a big rush of air when opening the cap. I think its a rush outwards, since I can smell fuel after it happens but before fully removing the cap. Anyway, I figured that my check-and-cut valve was probably dirty or broken, and it was a good chance to check it out. However, after taking it apart, cleaning it, and checking out how its supposed to work, I'm not sure if its the correct part for the car.
I could blow & suck freely through either of the bottom nozzles, regardless of valve orientation (they were connected together in a chamber, disconnected from the top nozzle), and the top nozzle (in the photos, actually points down when installed on the car) connected to both of them as long as you blew through it (there was a check valve, no sucking). What seemed odd was how everything was hooked up. The bottom nozzles were connected to the fuel tank and to the fuel line that runs up to the charcoal canister, while the top nozzle is connected to a fitting that looks like it leads into the cabin of the car, but doesn't have a corresponding fitting, connection, or any sign of it on the inside of the passenger-side bin area (not really a bin since it's underneath the spare tire cover in the convertible, but similar stamping to the bin area on a hatch).
Having no idea where the line that connects to the top nipple goes, (it definitely doesn't seem to run to a vacuum or pressure source near the engine), I can't see how the valve is supposed to work, cut off a potential fuel flow if the car flips, or anything else. The valve itself looks different than the picture in the FSM too, which leaves me more confused.
Does this part look familiar to anyone, and does anyone know where that unknown connection to the chassis seems to go/what it's purpose is?