Although I have ot tried any of the Bloog cartomizers I do know that they are compatible with other KR808 type threads. I know the Bloog cartomizers are a bit pricey... if you are looking for a 808 compatible cartomizer that will really preform you should check out the LR version at Ikenvape. They tend to produce some pretty massive clouds, if that's what you're looking for. I should also mention that the price tag is quite a bit smaller.
I have seen some youtube videos about people taking the filler out of cartomizers to use it like an atomizer, but I really don't know why in the world you would do that unless you were at a point of desperation.
I hope that helps some.