I’ve had my 1600 for a little less than a week. I’m using usb 2.0, thru a powered usb hub and cat 6 ethernet connection. I have usb set to 80 and no problems with downloads.
Two problems that I have noticed are a noticeable rotation in the image with a meridian flip. Centered, but rotated about 4-7 degrees. I also noticed the rotation ( 7degrees) in images taken on the same side of the meridian on two consecutive nights. This has happened using a 10Micron mount with two different models of 60 -62 stars. Polar alignment was about 2’ rms. yes, the polar alignment could be made better, but it has never been a problem for the STT 8300m on a Tak FSQ 106, or the AGO 12.5" with Fli 11002m. Both platforms are on the 10u mount and I’ve never experienced rotation with my images before. On one of the evenings, I also imaged M8 with my larger scope before going to the 1600. Images from the FLI camera showed no rotation and stars were round.
The second problem is a noticeable tilt as evidenced in star elongation. I never had this problem with the STT 8300, so my guess is that a tilt tip adapter will have to be added. Stars were elongated in a diagonal and toward the corners.
As I watch the auto centering and plate solves being performed in SGP, they are all showing centering <= 1pixel