I got a futaba Mega tech for my used mini-x, but I'm still having the same problem with the glitchy steering when I press the throttle the steering jerks and while its driving it drives very erratically.
I've got that Tx and it works great. Hate to say it, but sounds like something else is hosed (tho I'm not particularly qualified to help out). Good luck, its a sweet ride when working.
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Charles to the players, no doubt...