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OAG issues arise from people who do not know what they are doing. its quite plane and simple!
A ruler and some knowledge will drop you pretty much on the focal point.
Another misconception that OAG's do not work is that people think you can put any dodgy sensor on it and happy days. Truth is that your not working with 50mm of aperature, your more working with 10mm and as such you need a sensitive or a decent guider cam.
QHY5 and OSSAG work but only when there are good star fields, when you get over to say Antenna galaxies, the pickings are slim you will not find a star in your FOV.
Sbig, Starlight express load star are the types of camera that you want to be working with. Light, small, extremely sensitive very fast intergration times.
If you where looking at moving up to a better newt you will be looking in the range of about $3-5000 with Orion optics CT or AG range of newts. everything else you will pretty much suffer from the same issues and even then with the CF tubing and the like you would want to look at OAG just for the reason it is so accurate!
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