This recent topic X359 burner pre heater plus the fact that I have an example that works almost as well, got me thinking. Could the rapid pre-heater from say, an Optimus or Petromax or any of the numerous clones be adapted ? The keyword here is “simplicity”. Using a spare brass Tilley 777 control cock and the rapid pre-heater borrowed from an Anchor lantern, here’s my idea of a practical alternative to Tilley’s idea of a joke rapid pre-heater. The 777 control cock has the same thread as the Tillite – 0.5 inch B.S.B., so will screw directly into the boss on the X359 fount. Although the threads on the Anchor rapid pre-heater are more course than those of the gauze filter, the diameters are very similar and not too much brute force is needed to screw the two parts together but not yet ! The fuel riser tube of the Anchor pre-heater didn’t want to come out so I had to work around it. First, I dismantled the cock to make it easier to drill it out to 9mm. Not only did this allow the fuel tube to pass through, it also left me with something I could hold firmly without damaging the all important 0.5 inch B.S.B. threads when I forcefully screwed the Anchor pre-heater into the filter end of the Tilley cock. The mismatched threads between the Anchor rapid and the Tilley control cock were worked in and out a few times until there was little resistance and then the threaded part of the cock was separated from the main body. The boss in the fount has only about 8mm of internal thread so the threads on the adapter had to be adjusted. Note that if needed, I can use pliers without damaging the threads. I had intended to solder the two parts together, so the two parts were separated and cleaned in preparation but as the Anchor part was borrowed and not really spare, I used plumbers tape instead to ensure a good seal. With a washer punched from a sheet of Viton, the unit was screwed into the fount. (I found out later that a lead washer would be better). When testing the operation of the device, I found that the lever would not go over centre and hold itself in the open position because it was binding on the fount. Before making adjustments, I tried this lever from a Petromax. Hands free. Time for a test run The Tillite alternative There’s still room for improvement, for example, I think it would be better if there was more clearance here img_2502 and 2503. Perhaps some glass cutting is in order. Henry.