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Agree with Bert on all those points. To guide my C9.25 I had to use an off axis guider and a Meade DSI II Pro mono. Side by side guiding was a waste of time and the colour Meade DSI didn't perform anywhere near as well as the mono DSI II.
I use a GPINT (but I have to be careful to write Hex null (X'00) to the parallel port at start-up - as Windows doesn't leave it in a predefined neutral state! I'd prefer the GBUSB- but either works when you understand its set-up!
Matt
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