I have a sound and non sound rs-3 unit. I would like to speed match them so i can run the as a 2 engine multiple unit. out of the box they run at completely different speeds. The sound unit seems to run slower. I have tried adjusting cv's on the main and have had to clear them with cv 8 equals 8 numerous times to start over. Could someone give me an idea on how to proceed. thanks in advance Brian