R0k9pZfT if you are using the ASI2600MC AIR, unfortunately you can't use maximdl, or any other program that requires a cable connection to the camera sensor. The AIR is, for some reason, not able to communicate with a PC through USB, so controlling one or both sensors with Maxim or PHD2, or SGP etc is impossible. I'm trying to troubleshoot my AM5N and the RA jumps and I have a 2600MC AIR as well. I tried to bypass the ASIAIR in the unit since the problems started after the firmware update to the latest version of the ASIAIR and try to guide the guiding sensor through a PC with PHD2. Not possible.