Having tuned many bows over my life, I have to say, its an expensive toy. It cannot and will not replace actually tuning the arrow to the bow. It will give you a starting point thats it, and I can do that by eye just as easy.
Sir, I realize your trying to hock this thing, and I respect that. But unless everything is lined up perfect, no cam lean, limbs perfect, rest falling straight, and you have the perfect spine for that bow, your tool is not of much use to us.
I guarantee you 9 times out of 10, you line up your rest with your tool, and then shoot field points and broadheads at 30-40 yards, the broadheads will hit different.
One should know all the techniques, from walkback, paper tune, bareshaft tune, then broadhead tune, that trumps this tool. Your spreading much misinformation and very misleading.