More back riveting of stiffeners

Riveted the rest of the stiffeners, drilled out some from the last session and re-did them.
A short movie:
http://youtu.be/MCXrj5iYP2o

Placing rivets

Keeping the rivets in place

Turned over, steel plate under, stiffener in place

Back riveting

Marking bad rivets

Drilling out

Prying the head away

Taking the back out, worked better than punching them out

re-riveting

setting up for the next step