my first vaping a mod experience. mod is a iStick pico 75w battery is a samsung 25R 26ga stainless steel 316L (i would tell you the # of wraps, if i could get the tank open) koh gen do cottton 50:50 PG:VG 20w @ 250-260°F the ring to adjust the intake on this tank is VERY hard to move when on a mod. when it comes time to unscrew the tank to replace the cotton and clean the coil. the ring that adjusts the air intake slips past is 'stopper' making the ring spin and crooked while unscrewing. so i get a false sense of unscrewing something that isn't really budging. i have been trying for the better part of 45 minutes to get this tank apart with no luck.