Prior to adding the focuser the telescope and cameras worked fine. If I only connect the focuser without connecting the telescope it also works fine. The telescope uses the autostar handbox connected to the computer via a usb/serial converter cord and utilized either ttyusb0 or ttyusb1. I do not seem to have any control over which port it uses. The focuser connects to the computer through a powered hub and a different physical usb port. Again it connects using either ttyusb0 or ttyusb1. I do not know if they always connect via the same ttyusb port at the same time but I do know that sometimes they do not. So, yes either alone work fine.

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