JR Z-1 (KO Helios) Synthesized Modual and 2 RS310 receivers!
I switched to Spektrum so I have my Z-1 synthesized modual and 2 RS310 receivers. If you are running a KO Helios this will work for you too, why run xtals when you can have synthesized.
$120 for all 3 pieces, Modual and 2 receivers
$45 each receiver