I've been taking a significant break in building due in part to the laser cut parts issues from Vans Aircraft, and basically running out of components that I could start assembling without eventually hitting a part I would be blocked on.
One of the pieces that I'll need to replace is the spar in the rudder. Fortunately, I decided not to make the final rounded bends in the leading edge of the rudder skins, since that have made the spar removal significantly harder. There were quite a few rivets that needed to be drilled out, but I think I managed to remove them all without negatively impacting any of the skins or ribs that are being kept. This took longer than I expected, and I ended up doing this operation over several days just to take a break from the task.
There are just a few more large rivets heads that are stuck in the rudder horn, but I'm considering just ordering a new one also since trying to remove the rest of the rivets is likely going to introduce some unintended damage to it.