Awsome scopes those ED100's Judith , welcome to 'Refractor land' you will get very good views of the moon , planets , double stars . clusters ,, etc. , etc. ,, as only a refractor can .
The mount will be great at holding the 100mm APO , have you got motor drives on yours ? , if not a basic single axis drive from Andrews will allow you to get the best out of the sweet 100ED , and that's a lot of performance , I would love to see a photo of the complete set up ? .
Congratulations on a nice refractor.
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Brian.