>>>>>>>I read that astrophotography tracking used to be done by hand control, be it via remote or knob, and the implementation of illuminated eyepiece. Is this something I can do with my setup? The mount seems to track well with a good polar alignment. Could I use a high magnification illuminated eyepiece to help with slight adjustments? Or could I even attach cross hairs to the monitor for alignment adjustments.
Sure you can do it. People did it successfully for a long time. I did it. I'm old. Not difficult, really, just tedious. As a matter of fact, I would suggest you give it a try. You already have the OAG, and you ought to be able pick up a reticle eyepiece somewhere for relatively cheap. It is nicer if it is illuminated, but people can guide without illumination. You just have to be able to tell where your guide star is in relation to the dim black lines on a dim sky. (This gets progressively harder to do as you move to darker skies.) Illumination is much better. But if you are paying much for the illuminated reticle, it would be better to save for an autoguide camera. But, it can be done.
Your joystick should work, assuming it moves the scope when you move the stick. Just be careful you learn to just tap it so that you do not overdo the guiding. If it also had pushbuttons such that one push moved a specified distance, it would be even better.
Before you go out and spend money on a reticle eyepeice, be sure to put your rig together, including the main imaging camera, and the OAG, and one of your existing eyepeices. And give it a try. Can you even stick your head into the area left for it? Does everything come into proper focus? Main imaging camera and OAG? Can you guide at all----that is, even without a reticle, you can tell if something is drifting. Don't look at the center of the image for your guide star.....pick something along the edge of the Field of View----is the guide star moving in relation to the edge? If so, what happens when you touch the joystick?
If your experiment works out, then look into spending on the reticle eyepeice, and try it all again.
Having said all that, I think it would be fun to do. At least once or twice.
>>>>>>>>Or could I even attach cross hairs to the monitor for alignment adjustments.
I do not understand how this could happen. What are you monitoring? The image from the main camera? No, you cannot monitor it because it happens only at the end of the exposure, when the subframe is already ruined by the bad tracking. You have to correct in near real time, like every four to six seconds.....maybe longer depending on your standards and tracking, and all that. (And if you had a camera that could do that sticking in your OAG-----you would be using autoguiding!)
>>>>>>>I read that astrophotography tracking used to be done
You make me sound so old.