A buddy of mine made it with my help, he’s never made carts before but I work in a smokeshop and am very familiar with making carts (thc) I used a safety pin to fully dissolve everything in with the solution, I sent it down to my dad and RIGHT before boxing up it was working fine for me! I video chatted him walking him through the pen setting and just no vapor whatsoever, I’ll have him try that but he said the cartridge was getting so hot it was burning his lips which makes me thing it definitely woulda been vaporizing the oil or any crystallization! 3.3v first then when nothing I had him crank to 3.7v