CycleCat
Contributor
Ghetto work around if you don't want to buy a poppet tool is to use a whittled down chopstick or plastic spudger to keep the poppet from turning while you loosen/remove the nut. I rebuilt a few Conshelf seconds that way before I bought the poppet tool for them (4 prong poppet vs. the 3 prong you have there).
I thought about it but since these are just for experimentation, with no intent of rebuilding, I stopped there. I know I could get it apart if I really needed to but I don't.
I must admit, it's a lot less scary now that I've taken two 2nds apart. Their operation makes perfect sense now and I understand the importance of pressing the purge valve when adjusting cracking pressure.
Maybe next weekend I'll break into the AquaLung 1st from eBay and a Sherwood Brut 1st I got last year in a crate full of used gear from a friend getting out of diving.