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Re Finder-Guiders, (thanks Lewis for bringing that up), I just bought an Orion Mulit-Finder and am finding it very useful. At 70mm it's harvesting 50% more light than a standard 50mm finder, and I can hang just about anything off the back. It has a helical focuser at the back, and needs a diagonal to achieve focus, which is ok because you get a right angle finder out of that. I'm running a 20mm Superview EP on a 90 degree diagonal and its working really well for my old eyes. I can also stick my ASI130 guide camera on it to create a video finder - a device I am thinking has real value to me in the future. It can be a guide scope as well. It is a little bit heavier than a 50mm finder but as it can be dual purpose you potentially could ditch the guide scope off the rig. Mount it on a Skywatcher Guidescope mount and it will be easily X,Y adjustable across the sky for guide star locating.
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