I haven't tried mine yet driving my EQ6, but if I get a chance, I'll give it a run at the weekend. One thing worth noting is that it often helps to turn off the FIFO buffer in the device manager. I had one system that wouldn't download reliably and when the FIFO option was turned off the problems disappeared. I personally wouldn't try updating a synscan (or autostar or any other flash upgradeable handbox for that matter) on anything other than a normal comms port. FYI there is a bit more discussion on the Aten adapter in
this thread.