Is there a possibility that some dive shops will refuse to fill your tank if they don't recognize the name on the sticker as being a brick-and-mortar dive shop? In other words, is there a dive shop bias against independent inspectors?I have tremendously mixed feelings about the VIP cert class. It's not cheap, most of the PSI/PCI course material is scare tactics and how-to info of the "like, duh" variety, and they don't tell you (or at least my LDS didn't tell me) that the class is useless without buying a bunch of testing-related supplies. Buuuut the class does have a good return on investment, especially if you're developing a goodly sized tank farm.