3pk 2.4 603FF and FS Rx's.....for over a couple year's now and no heat issues....WITH a losi Regulator DIRECTLY beside the Rx......Granted i dont run in anywhere near 100degrees but have raced on some Hot Hot days where if it were to happen it would have happened....Long main or short Ive personally never had it happen.
This how ever does not mean its not an issue....look at all the guys that have....so Ill agree that Futaba needs to get off their keester and fix it...but look at Atsushi and his 4pk...has he ever had issues.(dont think so)