Here's the latch. Just two pieces of brass that fit tight inside each other. The inside one is filled with solder. Strenthens the tip (which is tappered to a 45) and allows me drill a hole for the wire that goes to the bellcrank. The solder should keep the hole from rounding out. I don't expect a lot of wear, here. Bellcrank and mount are lite ply. Bellcrank pivots on yet another PC boad standoff, with the same brass tubing epoxied into the ply for a bushing. The standoff is just a little longer than the tubing, and then a screw and washer are put in on the bottom just like you see on top. Loctite is used because Im not putting a hatch on. Don't ask me how many times I've dropped the tanks for everyone that's been over
I put some advantage in crank, then added more later when I realized just how short a throw I needed for the release. That's the reason for the extra hole (turned it around and tried again). No need for keepers or z bends unless the bellcrank comes loose.