There are many posts recommending against, for example, a 224-based camera due to the difficulty when using a small sensor to locate and center objects. Based on my limited experience, a setup that does a platesolve after a goto and adjusts accordingly takes care of this. On my ASIAIR Pro, the minimum FOV for a platesolve is 0.2 degrees. My smallest sensor, a 178MM, and longest focal length, a C6 at f/10 just barely meet this. But they work. (With a reducer, the 224 might work, too.).
I believe other software, such KStars, also has the capability to do platesolves as part of a goto. For anyone who's using this feature in their software: are the minimum FOV requirements for platesolving similar? I'm considering adding a C8, and at f/10 with the 178MM the ASIAIR Pro platesolve probably won't work.