I can see all of the joints... and all the way up to the shower head area.. if I pull out my insulation. I find it odd to have configured this will so many pieces. Heating one area I think would loosen one nearby. Maybe I can get a micro torch, or see if the one I bought can do a smaller tighter frame and then try to only hit that area where I see the drips escaping. I can get one hand on it fairly easily. To, would be tricky, but depending on the task.. doable. The idea of using PEX... seems more promising, though I'm not clear on how I might secure the section up at the shower head.