I believe that GN and Kippax have their own private willow source and are not dependent on JS Wright. GN do not have separate grade levels (at least they do not publish it). GM does not allow handpicking of their bats as well (unless you are sponsored by them, I guess). In my experience, the lower grade bats are often pressed a little differently so that they take longer to open up creating the need or craving for more expensive models, which open up faster. Capitalism-- you can run but you cannot hide, much like a Malcolm Marshall bouncer.