Duncan,
Can you explain the set up that you have and what telescopes you are attaching to your mount?
Are you talking about the bar that is used between the main scope and the guide scope.
I have an ED 127 and an ED 80 on an EQ6. The ED 80 is attached to the ED 127 by way of losmandy rings in the same way that the ED 127 attaches to the EQ6. The losmandy rings on the ED80 have side screws the same as the dovetail on the EQ6. This is because you can't do the screws up on the bar from underneath or above to attach the guide scope to the main scope.
Losmandy rings were the only way that I could work out how to attach the guide scope to the main scope. This is also the case when I use my 200mm Newt on the EQ6.
Please excuse me if I miss the point.
Frank
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