With this particular company I find you really do, I have used all sorts of adapter and different cartos on this Bat to try and accomplish the same thing your trying to do, just doesn't work. I find using their carto's is definitely best in this situation your in, they really do have a nice little set up and a very good matching Batt/Carto. I know they are more expensive but its just like your saying. I really like there stock menthol carts and there even hard to match flavor wise too and I DIY often.
If you want to save in the long run and want to try other carts you would be better off buying an Ego Type Batt, the new dual coil carto's that are out seem to be pretty good and Ikenvpe.com sells some very good carto's, they will be re-opening up tomorrow and fully stocked, other than Iken try Boge cartos, between those two you wont find any better as of right now on the market I dont think. Good luck.