both the diameter and the pitch. The 510 batt has a female fitting, the KR808 is also a female fitting. Sexual preference aside, to get these two to connect up, I need to use a connector, (converter), which has the proper male threading on each end. So, off to Mad Vapes I goes to purchase a couple of couplers. Pleased with the delivery time, but when they arrived I was in the middle of an eGo Super Mega coneless carto, and I didn't get around to trying the 808 to 510 hookup until a couple days ago. Everything bolted up fine, hit the button, and sucked till my eyes liked to pop into my head. This was not gonna work at all. But, I'm thick headed. So, I suck on that sucker for a couple days trying to get something outta the end of that carto cause I just purchased about 50 of um. Finally, in frustration I sent email to Mark at Mad Vapes describing my poor experience with the converter I'd received from them, and ask for something that worked or a solution. He informed me the converter has a flat blade screw driver slot and they can be screwed in/out to accommodate draw preference. Bingo! Life is good again. A full 360 turn out and I'm vaping my head off again. I haven't been at this long enough to discern differences in the quality of the vape tween the 510 and 808 cartos yet. As I understand it EM has both their original native 510 RIVa, (for 510 cartos), and now a native 901 RIVa is available. Which I assume bolts up direct to KR808 cartos without a converter. If I'm wrong, somebody knows more straighten me out.
Cheers,
otrpu