actually to be fair I've tried several crystal pairs and not much seems to work. Lots of servo jitter but calms when the tx is on, but still not working. It was butchered pretty badly too with additional switch and some 8 way toggle panel taking over a channel as well. Nicads as well, so one for the museum I think..
Frsky looks good, but not wanting to risk it if there is something else wrong, best I would imagine to use on a set that is known to already work before the upgrade.