O.k. Nemmy Users - a hand for a Nemmy Noob, please? I have been using my Nemmy with one particular KSTM base that has been working exceptionally well. I wanted to throw another tank on it, but it won't fire. I've been fiddling with the contact pins (and just put in my new copper contact pins that arrived unexpectedly today

) I'm backing out the top pin and setting the tank in the top cap. Once the tank is flush, I adjust the top cap pin until it's hitting the pin on the base. The switch pin is basically set all the way in (I'd seen that it's better to not adjust that pin?)
CanNOT get this tank to fire. I've tried a Nauti, and no fire either. I pulled out my DMM and confirmed that I don't have an "open" to the topcap.
Suggestions?
TIA