I had the exact same setup... Twinstar w/ two .36's.

I assume you have a computer radio.
Ch3 for one engine, Ch 7 for the other. Get the throttle linkages close mechanically.
Use the computer radio to "slave" channel 7 to channel 3. Now you start the engines. Use the Ch7 trim knob to trim that engine to the engine on Ch3. Easy, simple and very effective. You can hear when they are in synch by the elimination of the beat note. You can get them nearly perfect this way without any special hardware. I fly a Hitec Eclipse 7 radio.