Rudder: Cockup!

This was an avoidable accident yet it happened and it was my inattention that caused it. I had previously located the male die pin through the skin and was ready to strike the C Frame assembly. I moved the upright skin very slightly to afford more access and without noticing that the lower skin had bent up very slightly and move off the 'pin'. I struck the hammer and just the sound said.... WTFW!? The hole was now ovate. I felt that everybody would say the same as me... What a fool. Vans suggested that I find a tin of Hole Begone, if unable to find any then forget about it and move on.

Re dimpled the original hole having used a flush die set first to remove the errant dimple. Van's suggest just to fill the hole after riveting. No harm done, I don't think so, but that's their advice.