I had purchased an micro electronic soldering iron which is used in
elecronic industries to solder miniature circuits, to this iron in
series i connected an electronic fan regulator or you can call it a
dimmer, and now it controls the temperature from room to the maximum
of the capacity of soldering iron,normally it is 250 degrees
I think you can get this electronic soldering iron of good quality
for $15 to 20 approximately.
I made different tips from silver wire for this above wax pen.
Hope this helps.
May all be peaceful,happy and healthy (mentally, Physically,
Spiritually and Socially)