Not how I ever want a first post to go but......I replaced the motors in my 230si tonight. I was careful not to bridge the solder joints but I must have on one of the motors. The 2 rear spun fine but the right front was slow and the left front nothing. I unplugged the battery right away but to late, The smell of burnt electronics was in the air. I re-soldered it even though it looked ok but now when that motor just spins as soon as I plug the battery in. My guess is I fried the control board. Any suggestions other than to spend the $50 on a new one. Darn old eyes