Hey ECF this is my first post here but I have been lurking a bit. I am building my first mech mod and I need an RBA that won't leak the way RDA's and genesis style atomizers do. To my knowledge that narrows me down to kayfun style atomizers (kfl+, r91, taifun gt, aqua), or a carto tank and rebuildable carto (eg. ibtanked and killer 705). I can't spend more than $50 on the atomizer so if I want a kayfun style atomizer I will have to get a clone. I was about to purchase the ehpro kfl+ for $35 but I heard that it has a very tight draw and am now rethinking my decision. I would prefer a r91% clone over a kfl+ clone because I have heard that the r91% has a more open draw and the mod I want does not have airflow around the base of the 510 connector so the airflow control on a kfl+ would be useless. I have not seen any r91% clones, only kfl and kfl+ clones so if you know of one or have suggestions of a better portable rba under $50 please let me know.