Still using the same Airtronics MT-4 SSR 2.4 GHz Radio System w/RX-461 FH4T 4-Channel Receiver that I have been using all last year. This is a brand new Xray XB8 that has yet to even have the motor started! Tried both my LiFe and LiPo batteries. Throttle servo works fine. I am thinking the same thing as King Dork; one foot in the grave. Time for a new one. I just hate to spend $100.00 until I know for sure. I have not had good luck with ProTec servos. Should have bought a Hitec HS-7955TH to start with.

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