I also agree about wanting to 'know' about impending problems by seeing glitches as it happens so I can land immediately and check things out. PCM doesn't give you this early warning, it masks minor problems until the trouble is bad enough to cause lockout and the resulting crash [], not good. However, in the US the AMA requires failsafe on the throttle chanel to shutdown the turbine in the event of radio trouble. That's a good thing though, you want the engine to shutdown before a crash not only to help prevent the dreaded post-crash-fire, but also to help minimize damage to the engine (read $). I've only got two PCM's one is in my only turbine plane, the other in an electric heli. I didn't know some PPM receivers have built in failsafes. I'm waiting though on the SpreadSpectrum 2.4 GHz to come out in a 10 chanel fully loaded radio like the 9C or 10S. That's when I'll be buying new radios.