Figured it out. It was the turret rotation limiter switch. I have never seen Tamiya use it before. I noticed that the runaway rotation started at either the 10 or 2 position during the rotation no matter how slow I rotated it. If it started at the 2 o'clock position it would run to the 10 o'clock position and visa versa. Double checked the plug in location, promptly shook my head and realize reading the other manual helps. I had plugged it into the wrong 2 pin location. Corrected! All is running perfect! This was not a Tamiya error but a builder error.
Last edited by texchap; 06-30-2018 at 05:47 PM.