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Hi Mick
I have a couple of older JMI NGF’s and a Moonlite motorized focuser.
The JMI’s a very good for the price, but I have to be very careful with seating heavy accessories such as my ST7, as the weight is too much and can lead to sagging, much as Paul described.
The Moonlite was more expensive and is a step up in rigidity from the JMI’s. It does not sag with the ST7 and CFW8 filter wheel.
If I were only using my scopes visually, the JMI’s would be fine as they would not be over stressed.
Cheers
Dennis
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