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					Originally Posted by Dave S.  I don't think it makes any difference where you put it in the system.  I put it on the front lower pulley behind the speaker where it was easiest to access.  I also added some wireties to create additional tension at the spring adjuster coming out of the bottom of the motor. | 
	
 
if you put the additional spacer anywhere other than between the motor and immediate pulleys on either end you will disrupt the front to back tilt/level of the window and will require additional alignment.