Sorry I can't post this in a more specific forum, but I do have a question hopefully someone can help me with. I have an IPV4 that I have been using for a couple of months and LOVE it! Here is the problem. As of this morning my Herakles tank will not thread onto the IPV4. I have multiple tanks and none of them will thread. If I push down on the tank and hold it there no problem, the IPV4 will fire. It feels "mushy", if that makes sense. Anyone else have this problem or anyone know of a way to fix it?