I`ve got a couple of reports today, First of all Trisha, i have coiled your subby RBA ! Done it at 1.7 ohms, and wicked it with Rayon, Rooted out your OCC coils, and put them in the envelope. Just need you to PM me your Addy again, and i will post them tomorrow. 
Secondly, i wasn`t happy with how one of my kayfuns was wicking with chefs doughnut King. I had a 2.2 ohm coil in 2.5 diameter, and it was wicking really slowly for some reason, so i cast my mind back to my old V 3.1 KF`s and how i used to set them up. I remembered how i used to even do them with nano coils, and how good they were.
Sooo, i ripped the coil out, and put a 2 mm 8 wrap of 30 ga, for 1.7 Ohms ( Same As yours Trish ) Rayon wick installed, primed her up. Now bearing in mind with the coil i took out, i could only push the watts to 9 Topps, without it tasting burnt and rancid, with this new build i am currently vaping at 18 watts, and it really is fantastic. I liked it so much, i did an exact same build in another KF, the one i put a 3mm coil in yesterday ! That is now being vaped from 11 watts on an i-stick, to 16 watts. Bloody great
So if any of you are having the same wicking problem with a kayfun V4, it seems they really do prefer a smaller dia coil.
Secondly, i wasn`t happy with how one of my kayfuns was wicking with chefs doughnut King. I had a 2.2 ohm coil in 2.5 diameter, and it was wicking really slowly for some reason, so i cast my mind back to my old V 3.1 KF`s and how i used to set them up. I remembered how i used to even do them with nano coils, and how good they were.
Sooo, i ripped the coil out, and put a 2 mm 8 wrap of 30 ga, for 1.7 Ohms ( Same As yours Trish ) Rayon wick installed, primed her up. Now bearing in mind with the coil i took out, i could only push the watts to 9 Topps, without it tasting burnt and rancid, with this new build i am currently vaping at 18 watts, and it really is fantastic. I liked it so much, i did an exact same build in another KF, the one i put a 3mm coil in yesterday ! That is now being vaped from 11 watts on an i-stick, to 16 watts. Bloody great

So if any of you are having the same wicking problem with a kayfun V4, it seems they really do prefer a smaller dia coil.
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