Pretty excited, I just got an Optimus no 96 off ebay. It was in good shape and had a nice patina on it, so I decided not to polish it. Replaced all the seals in the NRV and filler cap, replaced the pump leather, and soldered a small leak/crack around the joint between the fill cap threads and tank body. It's burning great and has cooked a few meals already! I do have one question for the experts out there, my reserve lid does fit, but it must have come from a different version of the stove as it won't screw on to the threaded stud on the fuel tank. Does anyone know if these threads are a standard pitch? I would really like to screw this on to the tank when not in use so I don't lose it!