If you've got some ptb and another carto why not do the cut wick mod with ptb and use the cut off in your wickless unit. Just a thought.
BTW I think v1John or nav or one of the guys used ptb as their coil wick and whilst it worked when kept uber wet it burnt or melted pretty quick if I remember correctly.
Just for further info, don't touch the wick whilst it still has
juice in it. The thing unravels, shreds or falls apart faster than you can blink. Its as strong as anything when dry, but a different fish altogether when soaked in
juice. If you want to clean your carto, first thing you need to do is rinse it out (gently) in water to get the
juice out then your right to go. I even drag the wicks out when I'm finished cleaning and squeeze them dry to speed up the drying process, with no ill effects.