Digital servos?

[kevinF]

That's what I did Al but the steering servo is still doing it. I'm pretty sure the screw that hold the linkage to the horn is catching on radio tray. but I'm not sure.

with wheels on or off the ground??? if the wheels are on the ground and nothig is castching thats normal. put the buggy on something so that the wheels are off the ground, then turn the wheels all the way to the left and right, if they hum when turned all the way to one side then decrease the amount of travel untill it doesnt hum. this will ensure your servos last long