After almost a year of vaping, I feel as though I need to upgrade my equipment. I'd like to work my way into mechanical mods, and the SuperT products seem to be right up my alley. I've been doing my fair share of research, but there are a couple of questions that I still have. I'm trying to decide between the P10 and P16, but there's a good chance that I'll get em both 
1. I've seen a few videos of some of the older SuperT models, and they had a locking button to prevent accidental activation. Do the current models still have this?
2. I read in one of the threads here that there is an option to get the PVs vented. I know that there's some debate as to whether or not venting is necessary, but I've always subscribed to the "better safe than sorry" camp. How do I go about ordering a vented P10/P16? I didn't see that as an option in the website.
Thanks in advance for everyone's input, and I hope to join the SuperT family soon.

1. I've seen a few videos of some of the older SuperT models, and they had a locking button to prevent accidental activation. Do the current models still have this?
2. I read in one of the threads here that there is an option to get the PVs vented. I know that there's some debate as to whether or not venting is necessary, but I've always subscribed to the "better safe than sorry" camp. How do I go about ordering a vented P10/P16? I didn't see that as an option in the website.
Thanks in advance for everyone's input, and I hope to join the SuperT family soon.