Started on the wings today, 26Jan10, and struggled for hours to remove any solid rivets and I have the tools. So I searched the Internet and found "Removing Solid Rivets" by Gil Alexander – EAA Technical Counselor
It works really well on the big solid rivets. I drilled with a #20, but not as deep as he recommended and used the Riveting Hammer to punch out the rivet. I have a cinder block backed by wood up against the Spar acting as a bucking bar. I lean against the cinder block with my chest and reach over and insert a 5/32" punch and tap out with the Riveting Hammer. There is a minimum depth to ensure easy removal. The biggest problem is the layers separating and binding the rivet.
A look at the rivets.
In hindsight, I should have drilled out every other rivet head to minimize layer separation. A 3/16" bolt/screw works to fill the hole after rivet removal. Then I can remove the remaining rivets. The next wing will be much easier. I think it is possible to drill out the tail of the rivet and push out the head on those rivets buried next to a rear rib.
That's my story