Hi Rodney,
Ideally you want to snug the clutch knobs up just enough to hold and no more but it really makes about zero difference to the servomotors. Obviously there will be a very small additional load placed on the thrust bearings if you really crank the knobs down but in reality this presents minimal additional load on the servomotors because for the most part the thrust bearings are already fully loaded by gravity working on the load presented by the mount and any payload in the saddle. You can easily verify this if you have a Gemini 2 by monitoring the lag data on the Servo page of the Gemini. You can have the clutch fully loose and fully tight and will see no change in lag or duty cycle.?
Chip