Hi Paul!
that's good! I have to change my efest 1600's twice sometime's three time's in a day if I go to .4ohms.
because of the drop off on the efest in performance I normally make a coil that hit's good when the battery is lower, and with a fully charged battery just take shorter hits.
I hate having to compromise but ive only had these efest 4-5 months so i'll use these up first.
Did you find a cheap place to buy them ?
I got them from uk-ecigstore for £7.50 each.
Anyone know if they normally sell the Cyclops afc part on it's own without the base at uk-ecigstore??