I am using swivel links on the controls, both ends. They really help to reduce any slop or play in the controls. The very little bit I do have is all in the servos. In the past I used snap links or and z bends. Even when it started off pretty tight, the holes in the control horns or servo arms would enlarge over time. I don’t think that can happen now.
Using swivel links similar to these
http://www3.towerhobbies.com/cgi-bin...?&I=LXFPW7&P=0
The flaps drove me nuts for a long time. I am using 1 servo to drive both halves, and just stacked 2 swivel links atop each other. 4 40 all thread is what I am using in between.
The flap torque rods are 4 40. To ovoid have to bend and align the unthreaded end, I have the threaded end going into the flap, and put a well collar on the other with a 4 40 Socket Head Cap Screws as the horn with STRIP AILERON HORN CONNECTORS threaded onto the bolts. The swivel links then bolted to those. No play, well a little bit in the servo.
Just a snap ball link on tail wheel.
Much to my dismay and surprise the STRIP AILERON HORN CONNECTORS would twist slightly when moving, changing the flap deflection just a little. So I added a second collar / bolt and STRIP AILERON HORN CONNECTOR, and just passed the swivel connector bolt thru both. That solved that. Not very elegant, but I will come back and revisit them.
Might even take some bar stock and make my own collars that are drill and tapped for 2 bolts and 2 set screws. Then replace the STRIP AILERON HORN CONNECTOR with a pair of brass barrel nuts with a brass tap soldered to it (pehaps silver solder?).