Been off analogs 2 years come January ecigs have been quite a good thing for me I just recently bought my first hybrid granted its on the cheap side but i do like it so far. I was actually able to get it going within a few minutes thanks to the vaping community that is out there.If anyone else has bought the rainbow elite hybrid i thought i seen a post somewhere where you might be able to use the top cap off a sigelei 19 and have a 510 connection on it also if anyone knows for sure please let me know. Thanks