Everything works I have been rebuilding protank heads for almost 2 years 8 wraps of 28 for 1.5 or 5 wraps of 30 for a 1.3 all wrapped around a 2 mm precision driver silica sucks IMO, cotton yarn works but can sometimes wick too slowly, organic works well but don't restrict the wick with the coil less is more, Japanese cotton works even better practice and you will find the perfect amount for you but make sure you trim in the proper direction with the grain and last but by far not least is the cellucotton still less is more but wicks so fast never had a burn unless the tank runs dry. Now as far as maintenance every few days pull the cotton or whatever dry burn until juice is gone and the shmuts burns off pulse and blow so not to burn the insulator and re wick. I have probably 6 heads and have never had to replace any just rebuild, rebuild, rebuild. Until you decide to try Kayfun or a Fogger but on the run a protank or a mini are very hard to beat