Hi Bill,
I am not sure if the MaxIm DL support runing the 2 case at the same time.
I tried on my PC, it could not run twice on my side.
But for the ASCOM driver of our camera, It is not a good idea. Only have 1 camera, but there are 2 software want to control it. All of us knows that it is not a good idea.
For the current, it is not a easy work for us to update the driver to support the third cameras. First, this kind of needs is very rare. Second, it is also hard for us to test. For the current, we did not find a software support 3 ASCOM cameras.
So I recommend using native driver for the third camera.
For the qhy, if it could meet your needs, I think missing a sale is not a big thing.
Thanks
Chad