Sir,
If I could add one more idea.
The post I wrote in rcwarbirds to use the computer radio to "Map" engines together is too long to post here, but you might see if it can help you at http://www.rcwarbirds.com/htdocs/dcf...rumID8/17.html
This uses the mixing process to match one engine to the other without synchronizers. Just a thought, and hope it helps.
Twinman