Managed to knock off the fry spell and get back into the construction of the rudder again. I spent the first two hours or so paining the skeleton, there was a bit more time in it than I logged with the waiting time between coats.
I then cracked into the riveting of the skeleton, all went well. I had to be creative with a few rivets using the C frame with risers and spacers to get into a few of the tricky spots. Tomorrow I will get some RTV for the skin, and final assemble the rudder!