I know from reading posts that the blu cig is not very reliable and I have already orderd a 510. However, I was wondering if anyone knows if the blu cig carts will fit on the 510. I was thinking about trying some of their menthol ones and the customer service person that I reached wouldn't tell me. By the way she acted, I am suspicious that they might fit. If anyone knows for sure, I would appreciate it if you could let me know.