Two more things, and I hate to be a bother:
What kind of hardware / coil setup/ power / vaping style (MTL vs DL) is recommended with NETs? I know an open coil is one needed factor, but maybe I missed the other parameters in the threads I’ve read.
Can they tolerate the higher heats and Clapton coils, for example?
Is there a way now to clean the extract further? I mean, “winterizing” a PGA-base extract only gives a 6-15 mL life to the coil as you approximate. Would simple further/finer filtration add to coil life?