I was actually in the wrong thread since mine is the tank version. I found the "2ml" (1.25 ml) tank thread and these have a really deep connection on them under the sleeve. I needed to do some scary aggressive post pulling on my ego but it fires now.
I actually pulled the center post out a hair on the tank itself. Just a touch is all it takes. Neither one of the two I opened worked til I did that. Much better to pull the cart post than every battery you have.
