My wife and I went to the LHS yesterday as I needed to get some standard servos and a new receiver. after looking around I found it was cheaper just to buy a flight pack. I have always used Futaba products and know that futaba and JR are not compatible because of the positive and negative shift. But I ended up walking out with a JR flight pack as it seems that jr receivers will work on both positive and negative shift. when did JR start doing this to there receivers??? The receiver I purchased was an R6000. I take my hat off to JR