I do a lot of dripping with my Provari, and prefer 18650 mode while so doing. The extension caps rounded edge has been a cause for concern as to possible knocking over or not setting it down just flush, so today I made a nice wooden steady base for it. 2" square by 3/4" thick wenge wood, with a 7/8" hole ( hole needs to be slightly enlarged by hand for proper fit).
It even works to hold it steadily upright on uneven surfaces like this table.
Just thought I would share. Thanks for looking

It even works to hold it steadily upright on uneven surfaces like this table.

Just thought I would share. Thanks for looking