Actually, no I don't own a store, sometimes my hobby room does look like it though. I like to try both the 3U and 4U of rackets that I will probably end up keeping, some I like in 3U and others in 4U. Sometimes I sell the one I don't like and other times I don't. The AT900T is another racket I have in both 3U and 4U. I only have a BS10 in 4U and since I really like it, I might have to get a 3U from Eric one of these days.