Looking for a backup for my GLV-2 5v. I've considered the GLV-2 super mini, mainly because I could use the same batteries and (510) cartos and attys. I would like to check out some other models. I would like something small and probably a 3.7v. and definitely a 510. I usually use cartos. It must be a good vapor producer and it must have a manual button, no automatics. I would consider a wetbox. Any suggestions?