Okay so i'll start by saying I'm completely new to the e-cig world and know very little. I was looking for a inexpensive and safe option and decided on the Innokin T18. Some of the dispensaries around me sell cartridges for vape pens that have a 510 threading, which the T18 does. I figured I was good to go in terms of using that cartridge on the T18 safely, but then I read this about the T18: "Never use a short or flat 510 connection on any hybrid or hybrid style device. If unsure whether this pertains to your particular set-up, DO NOT assemble and use." As I said, I know very little about the e-cig world, so does this pose a problem with the thc cartridges that dispensaries sell? I know enough about e-cigs to know that improper use of a vape can result in some really unwanted outcomes such as a fire.