I have the same problem on my 43's but the leak is coming from the clicker screw, not the base nut or o ring area. It leaks worse at some positions of the screw setting and even after cleaning it with contact cleaner & air it still leaks. I have had it apart but I don't see how to disassemble the clicker because the c clip holding it all together looks impossible to reach without ruining the part completely. I'd like to know if it's fixable or has to be replaced, Thanks