soldering iron build
uses ngk glow plug , silicon nitride ceramic tip , 3mm tip , top of the line glow plug
25A momentary microswitch , beer keg stainless tube surround
fits a weller tip after being drilled out with 1/8 drill bit , then uses a small offcut of pyrolitic graphite thermal pad to hold it on by friction
switch needs to be held on about 1/3 of the time for lead solder
pictured is a spare glow plug and a Chinese nitride glow plug i bought , the Chinese version wont fit the weller tips at 4.4mm but is cheaper and more readily available
draws about 10 amps , im NOT using the high drain 18650s if i were it might be to powerful maybe