350ZMO i tried to solder my V4 and it didnt take, had to hammer it back together and got a V3. and to update my drip tip issue hardware store had what i needed and even though its black rubber o-ring its working great so far no issues as of yet. tax money is on the way so soon i hope to post my V4 rebuild pics once i get all my parts ordered and start working on it.
Thanks rucni I figured I would have to completely disassemble it, thoroughly clean the mating joint and collar and was planning on using a reflow technique in an oven as the brass tube would need a lot of heat, and that was just a lot of effort so I decided to get the V3, and that was a good choice. Still have the ol V2 laying around though!