Soooo... i'm using the "Mega T-rex 1100mAh" from Liberty Flights, and it is a 510 connection. It came with a 1.5ohm atty, and a 2ish ohm atty. The carts are a two piece design the juice cup is removable and hold about 20or so drops of liquid, BFD mod saved my life btw! I can tell the difference in the two greatly i like the feel of the LR, but without going into a mod as of yet. I was wondering what differences in the different style connectors? Which ones have the best track record as for not burning up? Give the best vapor/flavor? easiest to work with? so on and so forth... I'm just curious if i should move away from the 510's or stick with them. I would like something that holds more fluid but i don't know if i wanna switch to the tank system as yet. Any suggestions will be appreciated. Thanks in advance!