aaagh! Been loving my kayfun. Finally an mtl which I really enjoy. Got a problem. My juice control came loose last night and now I cant get it back together. The 510 contact screw grabs the UC bottom section just fine by itself. When I try and put the 510 insulator on, the contact screw will just not reach the threads. So annoying. Anybody else had this problem? Spent hours just pulling apart, reconnecting the spring and every piece but to no avail. It is infinite if that helps.