I didn't take it as a blatant pitch, either. I took it as an easy way to help people determine on their own which is their "bad" side. Then they can work on improving it, account for it, and be aware of it while playing. Makes perfect sense to me. (Whether I can take advantage of all that is a whole other story

)
And yes, the man does sell a product that is supposed to help with those issues. And yes, if one were to use this drill and discovered a difference in one eye or the other, they might consider his product further. I don't think thats a bad thing, and it wasn't beating us over the head about it.
At least to me, and I'm in the sales business. I've seen hard-sell, and this ain't it.
Thanks for the drill, Geno. I'm gonna try and arrange time to try it.