OK Stig, my experiences. Brand new Futaba 8UAP radio with PCM RX. One of the first flights the plane's controls go hard over in flight and crash, nothing left. Did not go into fail safe, just everything to extremes, came back for an instant, then back to extremes. Futaba could find nothing wrong with the receiver. A mystery. A few years later, Futaba 9Z with 9 channel Futaba receiver: original Isobar goes into fail safe and flies into the ground. No cause ever determined. By that point I had had it with brand F. I had some radio issues with JR, but that was years ago and was not exclusive to PCM. I always am meticulous with radio care, but nothing I can do about sloppy quality control at the manufacturers.