BTW, I just noticed your "heating plate"...gives me ideas.Nice. Just made myself a magnetic stirrer out of a hard drive magnet
and a six inch box fan out of a big old IBM mainframe.
Have it powered by a variable voltage ham power supply I grabbed off my radio shelf.
Works good.
I heat things up in Baine Marie to about 108F in the crock pot
then move the erlenmeyer flask over to the stirrer.
When it's all done I put it in one of those reversible coolers on heat
for...until I remember to take it out. The rest is a proprietary secret ;-)