I've discovered what I believe to be a bug in the ASCOM driver though it might be in NINA. If I can NINA connected to the camera (DL Imaging 1) and the PHD2 is connected to the guider (DL Imaging 2) if I disconnected NINA from the main camera and then try to reconnect I get an error. Only after disconnected PHD from the guider can I reconnect to the main camera in NINA. Weirdly even with PHD2 connected to the Guider I can connect to the main camera via Maxim DL directly but I'm assuming that's because its doing a different kind of connection on the backend and isn't using the ASCOM driver. If there is any sort of testing I can do for you about this bug please let me know. I assume this is not the desired effect.