I haven't used more than eight of the Smoktech 1.7 ohm LR XLs but I haven't had any problem with hard draw except when there is juice in the center air passage after refilling. I routinely check for that after filling now.
I also find that the taste of these cartos improves after the first couple of fillings. I've been using the current 1.7 for nine days now.
There is a draw adjustment screw at the base of these cartos. 1/4 turn either way provides the full range of adjustment. It's easiest to make this adjustment after filling the carto. I do it with a drip tip on and before mounting the carto on the pv.
I also find that the taste of these cartos improves after the first couple of fillings. I've been using the current 1.7 for nine days now.
There is a draw adjustment screw at the base of these cartos. 1/4 turn either way provides the full range of adjustment. It's easiest to make this adjustment after filling the carto. I do it with a drip tip on and before mounting the carto on the pv.