I have not used the Futaba MSA-10 or the JR Matchbox (both are fully capable "synch boxes") I have, however seen them used and have never seen anyone have a problem with them. Those reversing Y harnesses are a whole 'nother bag of burning dog doo.... I don't like 'em or trust 'em, and I only know one person who likes them and his elevator servos still don't match at full throw. I, personally, would advise against the Y harness option.

I agree with mtwister. Programmer, transmitter or synchro box. The last would be your cheapest out. I think the 3010's will be fine and you're on the right track.