That's the danger of using too much heat, that can happen even with a low wattage iron. I've gotten several Super-Chuffers back for "repair", and more than once I've just aimed it at the trash can. 
You really need a fine tipped soldering iron for doing the wiring to the Super-Chuffer and Chuff-Generator. I've actually offered a service where I solder the wires to those and then ship them, that way you don't have to do any PCB soldering.
