I think I may need to be a little clearer about this. The carto that had the stiffer draw was a "SMOKETECH" Dual Coil 3.0 ohm from a different vendor. The fix takes about 5 seconds. With a diamond edge 1/8th inch bit make the valley deeper. EASY !!!! If people don't like the tight draw by all means call smoketech,send them a email, text em, whatever.... but definitely let them know in anyway you can,but in NO way is it ANY vendors fault that smoketech changed anything....if they knowingly even did change anything. If all else fails ....CHANGE CARTOS, their are many different kinds available now to suite anyone's preferences. Change cartos till you find out that its back to normal , or that nothing was changed to begin with. Take care ALL.