Lawrence James

FWIW, I'm using a skywatcher mount and asiair does not like having a hub between the air and the mount as well. I needed one more usb port so I got a two port usb hub cable. If I use it for the mount I can't get it to work. So I use it on the guide camera and the focuser. Works fine there. My skywatcher is one of the later ones with a usb port and build in usb to serial converter chip. To bad zwo didn't add a few more usb ports. You lose one for the memory stick. Then you have 3 and if you have focuser and/or filter wheel you're going to need more than 3.