RE: Comp ARF Valiant
The ailerons and elevators move freely on the hinge line and have more than enough throw. The rudder throw however is severely limited the way it comes from the factory. The upper portion of the hinge line on the fuse where it curves has to be trimmed back a good bit. Before and after pictures are shown. Just sand, reinstall the rudder and look for where it is binding. On future designs or a revision of this design, I think I would avoid a curved hinge line with this hinging method as you have to cut away too much material on the fuse side. The slots in the front of the rudder where the hinges insert into also had to be widened a bit to allow for increased rudder throw. According to the designer, you would like th erudder throw to go within about 1/4" from the elevators. Also according t the designer the supplied rudder horn may not have the right angle to allow for full throw. It was supposed to be modified so check your kit. I am planning on using a more convenional rudder horn and am just waiting for a long enough piece of 3mm threaded rod to arrive.
I choose an MK tail wheel assembly, 13 gms with mounting hardware. I know some people have made their own a little lighter but I do not know of a commercial version that is lighter. Installation was easy there is enough material in the bottom of the rear fuse for the screws to bite into. I used the rudder hinge pin to also attach to the tiller arm of the MK tail wheel. A short slot was cut into the bottom of the rudder for the hinge pin. The pictures should show what you need to know.