Wow thats crazy! and to think I bought my lathe to attempt to build one, as Mr. Miagi once said 'you have much to learn young grasshopper' I have a feeling it might take me a month too build one
You can build one on a Mini lathe in about 5 hours.... not including polishing
It's easy....
Start with 5/8 Aluminum... Chuck it up... Bore out the battery area... Set the change gears for threading it.... do the inside thread... face off the end.... turn the OD.... part it off... turn it around and face it off... set that aside...
Pop some 3/4" stock in and turn the OD of the center post, then the O-ring grooves... then core it out... face it off... turn it around and face the other side... in a drill press drill the wick, filler and ground screw hole... tap that...
Now pop in your 5/8 stock, bore out the cap, face it off, part it off and turn it around to chamfer the top... face offf the top...
You're almost done...
Next... make the switch... 5/8 stock... bore it... turn the major thread size... thread it... build a fuxture to hold the part and turn it around and make the welll for the switch button.... part that off
Now make the button... do the post first then part it off, flip it and face off the bottom...
Now ya need some half inch delrin... make the switch bushing...
And start polishing!