Okay so I read and read great things about the Greencig carto vapo production and I finally broke down and bought a greencig to 808 adapter. First let me say the draw is ok and the vapor production is good, unfortunately the Cherry cartos tasted like cough medicine and was not enjoyable at all. I will chalk the cartos up to a 15 dollar learning experience as I do not intend to take the time necessary to refill or mod the carts. I decided to try the adapter with a standard KR808D-1 carto and due to the air flow hole the draw is very smooth like a straw. The vapor is about 1.5 as much as I get without the adapter so at least i found a way to get insane vapor and without compromising taste or throat hit. The only drawback is with so much vapor produced the juice goes much quicker but I guess you can not have it all. I plan to try it with some HV liquid as it is intended to burn slower and will let you all know how it goes.