Make the rudder stops to be installed on the fuse to, well, stop the rudder travel where appropriate.
After these were drilled per what I though was spec... I test fitted with the fuse, and things just did not line up like I wanted. The rivets should align with the fuse rivet line already in place to ensure the holes to be drilled into the fuse in the correct place.
So, scrapped these, remeasured from the fuse, and made new rudder stops, and match drilled with the fuse skin after determining location.