Hello,
Overall I would say no burn.
I dont know if you can speak portuguese, guess not, but there's an old video from a portuguese vaping youtuber, that he is interviewing Pedro Carvalho which is the Caravela Mods creator and Pedro holds a PhD in Materials Physics also.
I dont know if you will get the chance to watch the video and understand it, but if you do, I will leave the link. Whatch after the 20min mark.
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In resume, he says, "use only Kanthal and no burns".
Hope It helps.
Peace