Anyhooo, back to business..

Great idea with the radius block, just make sure you get the J-rod to make it out of a very well seasoned chunk of Jarrah..
Timber blocks have the nasty habit of warping and shrinking if made out of softer timbers....
My Radius sanding bars are from StewMac... Over $100 bucks each but well worth it if you are building and repairing heaps....