I use the same CBA Tatone test stand attached to a 2x6. Works great for anything up to a 60 sized 2 stroke. Recently, I even bolted in a saito 100 without any difficulty.

For the throttle hook-up I use a simple method. I use a standard servo horn and a 2 inch drywall screw. The servo horn fits very snug on the drywall screw and does not vibrate loose. I have a small pushrod with a clevis on the trottle and a z-bend at the control horn. Because I have the whole shebang mounted on a 2x6, I can move the drywall screw anywhere I need to fit the carb configuration.

Although not the most visually appealing setup, sometimes the simplist solutions are the most effective...