That was my attempt at a more controllable version of this sort of thing:
https://www.ebay.co.uk/itm/226164458824
https://www.ebay.co.uk/itm/167007262940
A couple of folks were using the first one above to make balloons (might have been Leo B).
Mine is a 40W cartridge heater (from 3D printer) and glass bead Thermistor. I'm happy to ship it to you if you want to give it a try.
My interest in making foil balloons waned when we found the YoKohamas.
Steve G8KHW
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