so i have successfully built several on RDA units. yesterday i bought my wife a kanger mini top tank and myself an aromamizer. im trying to make my own coils on the RTA sections. i have been able to make coils successfully, but so far everything i have made has leaked. im also having various airflow problems. i believe my problem is not making coils but but how i am putting the cotton. can you guys tell me what i am doing wrong. i need to master this. thanks