Very cool Sarges

You mentioned about adjusting the z-bends. I hope you really me the clevises. These are the little plastic/metal peices at the end of the rod usually out at the surface. The way I do this is to turn the radio and airplane on and have the trims where then need to be and measure how much the surface is deflected. The I center the trim and turn the clevis until it gets the same deflection. Work slowly and methodically on all of the surfaces and you will be able to get the trims centered well and can concentrate on flying.

A good rule of thumb is if you need to rasie the surface you turn the clevis towards the surface and to lower the surface you turn the clevis away from the surface