Has anyone actually removed the crystal on the RFM69 and replaced it with a TXCO? If so which one did you use? The pinout seems to be for a can with the other two pads grounded, but TXCO's need a VCC. I've not yet taken one off or checked the pinout to see how easy it might be to bodge one on.
I need an accurate transceiver driven by +/-2ppm clock source or better for a server that's used for calibrating clients during manufacture, so not worried about power consumption.
Mark.