Hola FC:
Yes, that rectangle is mica.
As we discussed before the "infamous patented technology " of RBT is nothing else than the "old reliable hair dryer technology "
Nothing else than that, dedicated to a vape.
Good luck trying to name/redo a patent to fit the exact bla bla bla that needs a patent to clear a record/new patent??? I wish them the best.
On technique, I'm barely getting hot spots now.
The trick, IMO no matter how you "feather the button " or "adjust your draw speed" , IMO it's all in (I'm not screaming, sorry, so people can read and take some advice on technique)
SPINNING THE STEM AS FAST AS POSSIBLE OR AS NEEDED NON STOP TILL THE HEATER IS COLD AND NO MORE VAPOR IS DRAW. THIS IS A 2 HAND TECHNIQUE. IT WORKS ALWAYS FOR ME.
I'M SURE SOMEONE DID IT ALREADY.
GonG JOINTS GET SOFTER WITH TIME AND SPIN BETTER IMO.
TRY THIS AT HOME AND POST RESULTS PLEASE.
Stay vaped my friends.