That's a shame about the cams getting damaged. They are easy to deal with if you keep them greased and use a small blade screw driver to depress the plunger and rotate them open if they stick.

The elongated hole is not a problem. You will plug the hole first and then re-drill. We used to use nylon rudder pins to plug the holes. Drill to 3/8. Hammer a pin in and cut off flush. Re-drill. Chopped fiber and epoxy works better, but the hammered-in pin technique was fast!