I'm thinking of getting on of these for my FastSize because I'm currently sore from the FS noose. My only concern is the blisters. I'm sure there are people on here with years of vacuum experience, and I'm looking for tips to ensure that i never get a blister. I use the FS in private so I can keep an eye on things, but I don't know if you can see when something is wrong that may cause a blister.
http://www.autoextender.com/modifiedpop.html
http://www.autoextender.com/modifiedpop.html