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From my experience weight is only half of the problem with large
Newts. Newts from 8" up fitted with standard dovetail and rings
vibrate badly at the slightest touch, making an electric focuser just
about essential. My mount is rock solid, yet tap the tube and it takes
over 4 secs to settle. Anti vibe pads make no difference. The flexure is all in the dovetail assembly; it's just not heavy duty.
raymo
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