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just keep your eye on the balance of the scope when you run the finder on one side, sure its only 400g, but it does make a difference. I recently posted that i had to rotate the OTA to put the focuser/guider under the tube inline with the axis to stop getting the rotation and my balance came good.
Also do remember to offset your balance to bias one side or the other. If you are imaging in the East bias the Dec down, same goes for RA, bais it to one side. The rational behind this is to keep the motors loaded at all times and reduce backlash considerably. thats what i do and my standard shot is 10 min each which i get round stars with the 10" as long as the wind isn't around, and easy 10 min with the ed 80. i could well go into the 20 and 30 min subs for the ed 80 with no fear of guiding issues.
Some food for thought
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