I received my 2 Mini Vivi Novas today. First one I filled and it is great. The second one wouldn't fire. I cranked it down real tight onto the battery and it finally fired. But the connection comes and goes and the draw is tight. My question is... Is there a way to adjust the center post in the battery end to make it stick out further? Can I "lefty - loosy" the post or will that break a wire inside like some cartos? Any help would be appreciated.