What do you guys mean by bucking the rivet against the opposing one?
Does anyone have any pics or an explanation?
It's harder to explain than it really is .. a very easy thing to do.
You just put a back riveting plate underneath the rudder's opposing rivet, then just use that opposing rivet as the "bucking bar" for the rivet you are driving.
The skin will bend in slightly while riveting but will bounce back when you are done leaving a perfectly bucked set of rivets.
The tip of each rivet will touch and the new rivet will give way to the opposing rivet.
It's a recognized way to rivet, we went over it in the EAA riveting class I attended, but for my life I can't remember what the procedure is called.