My small glue pot may be of interest to Stan Claussens and others.
I use a coffee pot heating pad to heat the pot.  The temperature is not
as hot as ideal, but I have been using one for years professionally and
can guarantee them.  (My first was from wrecked filter coffee maker.)

The pot consists of a stainless steel jug and the inner is a stainless
steel flour shaker.  On mine I was able to fit the perforated top of
the shaker on its bottom; this lifts the base of the inner allowing
good water circulation.

Any thing will do; I have used a jam tin as an outer.  Have fun.

Brian Butler