Asking if a receiver is good enough to fly an expensive helicopter is not a fair question. If all receivers had the same perfomance, everybody would only sell one model of receiver!!! JR and other manufacturers carry different levels of performance. An R610 is not an R649 is not an R945. For an expensive Helicopter, I would only use PCM.

The R610 is not as good as the R700, otherwise the R700 would be the same, but with one more connection than the R610. Actually, the R700 has quite a bit more inside. I think is is better. For most gliders, micro planes and slow flyers, the R610 is just fine. Most folks have no problems.

It is too bad RobG was sold the wrong crystal. That is a hassel!!

Most JR receivers are single conversion and use the grey crystals. The R940 and R945 use the Dual conversion Red crystals.