To add to what Rick said, there is no need for an anhedral brace, but it is advisable to wrap a light piece of fiberglass around the joint just like you would for a wing center section. If you do not wrap the joint, you could end up with a broken stab inside the fuse. I've seen this happen a few times and you have to remove the rudder post to fix it. It doesn't take much glass. A 1" wide strip of 2 oz. glass will be more than enough.

John