I want to use cartomizers

[wingscup]

The adapters at mad vapes work nicely with kr8 cartos. I wasn't impressed with the carto's at first because the draw was way too hard. I then realised that the positive connection in the adapter will unscrew. 1/2 turn with a screwdriver and it was vaping as easily as my 510 atty's.
Still, I'm not very impressed with the carto's and keep going back to my 510 atty.

I was having the same problem, very hard draw. It wasn't until I read your post that made me realize that too. Man, thanks a lot. I was getting really frustrated, but now it works great!