RE: CMP Yak .50 build thread.
Step 3 - Installing the Rudder
First you have to slot the fuselage. The slots are not pre-cut in the fuselage, so you'll have to cut them. The back of the fuselage is balsa which makes cutting the hinge slots easy.
The manual tells you to install the tail wheel at this time. I plan on using a different tail wheel assembly out of preference, so I skipped this section. The manual shows how to install the stock tailwheel and is pretty self-explanitory. So basically cut the slots and use CA hinges to install the rudder.
On my model the counterbalance on top of the rudder required some trimming to make it fit correctly. It was too large.