Rivetted rudder (except for the trailing edge). Wrestled with some very tight rivets (and with the pneumatic squeezer). A lot of rivets were drilled out. Ended up with pop rivets in the very aft edges of the top and bottom rib and in the most forward place of the horn brace. Tried to mix up firewall sealant to glue the trailing edge wedge to the skin, but discarded the idea. The firewall sealant turned out to be very thick.
Next: Finding a locally available elastic glue for the trailing edge.