Rudder tip rib

[rodcritt]

So last night I machine countersank the last 3 holes in the rudder tip rib. Now I'm not so sure that was a good idea. I also countersank the bottom ribs last 3 holes. Is this is acceptable or do I need to order new ribs?
Any good advice would be greatly appreciated.

 

[Dave Watson]

I would call Van's and ask them. I think the material is too thin to countersink. Did you countersink them because they were too difficult to dimple? If so, go to my build site and go to my 11/17 entry to see how I dimpled those holes.