I have been holding off and doing my due diligence for my next replacement. Loved my M8, and research for me had the 4PKS-R as a phenomenal replacement. Most radio's at the track are M12's. but for the life of me I can't get the proper feel out of one. Same with the 4PX Futaba. I really liked the KO EX RR, and was really headed in that direction. But now this release from Futaba may have put my plans on hold. I must say, as a owner of there radio's, they never once let me down.