I build micro coils on my kayfun lites and always try for 1.8-2.0 and don't have any issues at all. I do prefer to not go higher than 2.0 but that's just my personal preference.
Anyone who knows about building coils (Mike, Myrany, etc.):
I just read here that micro-coils heat up very, very slowly if you make your coils over 1.5 ohms. Is that true?
I really don't like the heat of such low resistance coils. So, should I not bother with micro-coils? Should I stick with the old style since I prefer closer to 2.0 ohms?