Continue riveting rudder spar to doublers and ribs. To rivet in the tight places I took the head off the ZAC riveter and threaded on an 8mm nut so that it was just flush with the end, then I used the wedge method as described on the EAA videos. I had to use the hand riveter and take the head off so there was enough grip length. A bit crude, but still did a good job.
0.98 Hours.