This message was posted by Rod or Sharon on AmayaUsers.com. PLEASE DO NOT REPLY VIA EMAIL. Instead, respond to the thread on the WEBSITE by clicking here: http://www.amayausers.com/boards/cgi-bin/ultimatebb.cgi?/topic/1/1436.html#000010 The newer Z motors are stronger than the older ones. They are longer (lengthwise) than the older versions, therefore the chassis does have to be aughered out or a hole cut out to make sure the encoder on the motor does not or cannot touch the casting in anyway. I have had to perform this surgery a couple of times and it is time consuming...... Rod Springer Amaya Tech & Trainer =========================================================== The AmayaUsers Mailing List Website: http://www.amayausers.com Discussion Board: http://www.amayausers.com/boards Subscribe/Unsubscribe: http://www.amayausers.com/list ===========================================================