The wing rib nose block jig is complete.  The nose block in the photo is a practice piece.  The second practice piece.  Lessons Learned:

A.  Use smaller finishing nails.  I am not completely happy with the use of the finishing nails, but I haven't seen and/or thought of a better way.

B.  Set the router bit just a wee bit deeper than appears necessary.

C.  A 1-3/4 HP router is WAAAYYY sufficient.

D.  Be sure the brads are firmly set and not "proud" of the surface of the blank.

Now just to acquire sufficient aircraft quality ply for 36 of these and go for it!!!  My mechanic extraordinaire Dennis Toepke (see 46Juliet.blogspot.com) has tipped me off to a local supplier of aircraft ply at a lower price than Wag Aero or Aircraft Spruce and no shipping (but an hour drive each way).