Falling Rock,
Thank you for your suggestion, I thought about it, but the numbers will be off, you will be testing a solution with a cavity of say 1.07 rather than 1.01, with no left over yeast, high is sugars, etc, etc. I am dealing with a rough dude that wants to know where the sample came from. In that case testing none-alcoholic beer will be more acurate test. at the end of the day I was able to obtain some backset from a distillery, I will have that tested. I also received some numbers from another distillery who is willing to allow us to use them as reference. I will start with the numbers that the distillery provided us and see how that goes, i will keep the certified lab results if needed. again thank you for your suggestion.