I have to get my tanks vised every year which is $20 a pop. This class is $40 which will save me an insane amount of money very quickly. So my question is, can you take this class as a non Shop employee and be certified to vis my own tanks each year? If so, how do I prove to my LDS that i am certified to do so and even though there isn't a current vis sticker from someone It has in fact been vised by me and good to go?