Not sure if you've seen the article about the UHM12 A.R.E. rods, but it has a little chart with grain windows for all of the 2 handed rods. This might help your decision as to which blank to use, it helped me out.
The article should appear below the product description and is entitled "A new breed." I also found the same grain window chart in the photos on the Angler's Roost facebook page.