They are the Nelson RCL70's. The nutty nuts were added just to make sure the Nelsons don't turn on the bolt. I've had problems with the Dubro horns turning on the bolt. They were the 91 and under horns but still, I'd prefer they don't turn. This was insurance, it may look goofy but it works.
ORIGINAL: Silversurfer
JoeAirPort,
If you ever get around to dumping the Dubro horns, going with the RCL70 type ball links from Nelson, JR, and whoever else is making them now eliminates the twisting problem that forced you to use the nutty nuts. I have to agree that the Dubro horns make for a big assist in lining up with the rudder hinge line, though.