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Hi Mel,
I've only had the 20" out once since i bought it due to weather here in Brisbane. It was a drawn out process putting it together for the first time due to the abominable instruction manual, but it only took about 30 minutes the night I actually used it. It's probably a little easier to move about than the 16" in terms of weight, although putting the secondary cage on top is a challenge for one person. Goto seems to work and track well. Mirror showed some extravagant diffraction spikes on a couple of very bright stars, but the resolving power seems very impressive - omega centauri was easily showing individual core stars at multiple magnifications, and under light polluted skies Eta Carina was easily visible without a filter, whereas the old 16" wouldn't show much at all. A coma corrector certainly tidies up the perimeter of the view if that sort of thing is important to people.
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