MK does NOT go into failsafe with loss of signal with latest Rx updates, and new Rx (GR-24L ver 3.76 and 3.78) GR-32 http://www.rcgroups.com/forums/showpost.php?p=28134054&postcount=2305 GR-16 http://www.multirotorforums.com/sho...r-mx20-and-gr-16-newest-firmware-NO-FAILSAFE-!!!!! GR-24L = Me (ver 3.76 and 3.78 do not show transmitter strength decrease when you shut off Tx) I "think" ver 3.75 is ok. http://forum.freeflysystems.com/index.php?threads/mk-no-longer-shows-signal-loss-turn-off-tx.4204/