@jcash74 - I got my Purge squonk out last night and the Varitube 510 is configured for manual adjustments in my mod. The VT can be set up to be spring loaded or manual adjust (with the proper bits). Anyway, I'm guessing yours is manual adjust as well. It is not reverse threaded.
In the video, you can see I start with the pin backed way out of the 510. It's not loose at all even with the pin backed out so far. I adjust the pin down, put on my atty, snug up the pin from the bottom and thread on the positive contact. Couple of things to note: my contacts, while clean, have a ton of miles on them but still fire no problem. Also, the battery is just about flat, probably like 3.6V.
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