Airtronics 94162z mg bb t&b servo stripped out yesterday. I was able to send it to airtronics and they will either repair or preplace my servo, but I also ordered back up! Hitec 645mg will take it's place for now mabey for a while. I think it was due to a glitchey failsafe. I noticed it jumpin after a few runs but thought nothing of it. Until my servo sounded like a woman drivin a manual transmission for the first time!!