Ive been using the AZ Mount Pro for several years with a 19# F4 Newtonian. It’s been a great mount-fast and easy to set up and very sturdy with just the 2” tripod. At first I was observing with a smaller Schmidt Newtonian so when I purchased the new, larger, 200mm diameter by 32” length scope, I was concerned about the scope hitting the legs so I also bought the mini pier extension to go on top of the tripod. It turned out that the longer scope easily cleared the legs so I returned the pier extension and have been happily observing ever since.... well, I’ve had some minor adjustments done to mount to fix tracking issues.
I’m pretty certain that with the 50” scope you have, you would likely need the pier extension if you were going with the 1.5” or 2” tripod. Given that you’re going with the tri-pier, I’m not sure if you’d need the extension. I’d suggest getting the extension and returning it, as I did, if it turns out to be unnecessary. I would also encourage you to ask iOptron about your situation Since they can probably predict pretty well what you’ll need. They have been extremely helpful to me and might be able to tell you whether you’d need the extension.
Regarding the CW question, I use two of their standard 5 kg CWs and need to locate them at the extreme end of the CW bar, actually, the outside one hangs over the bar a bit to allow me to correctly balance the moment arm of the 20# 8” scope on the other side. With your smaller diameter scope , the center of gravity will be closer to the mount so your pair of CW’s may not need to be centered so far left of mount...easy enough to do the math and see - or, better yet, ask iOptron when you speak with them about whether you need the mini pier. John and Kevin are the two primary tech support people.
Regarding outreach, I suspect that you can manage that once you know whether pier extension is necessary. Assuming you’ll use a diagonal, only the higher altitude objects would likely be a challenge and that would only be if you’re doing outreach with folks viewing through the eyepiece. So much outreach these days is being done with cameras in the drawtube and people gathered in front of a large screen or laptop to view the objects. This usually is a far superior viewing experience for non- astronomers and eliminates the difficulty of assisting people of differing heights and ages to get positioned and get a decent look through an eyepiece. Once I experienced EAA, electronically assisted astronomy, I went out and obtained 1 color and 1 mono camera each and haven’t used an eyepiece now in over two years. Not only is it easier and better viewing that way, I also can see so very much more from my light polluted skies than I ever would with an eyepiece....it’s the way to go as far as I’m concerned.
Anyway, I hope there’s some useful info in the above. Good luck!