Wow thanks for all the tips the link to the methods the guy used was interesting. The hot gun idea sounds lengthy but promising, I may avoid the chemical route after I think about it (I didn't expect to soak it for hours) because I'm unsure of what effect it will have on the Heater Cartridge and its wire coating. I do have a soldering gun (heavy duty soldering iron) that has special attachments maybe I can clamp the block it to the tip....