Hi,
Has a quick go with my collimated VC200L @ F27, not sure what I think but its ok.
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Saturn/20060209SaturnVC200L.jpg)
I have now stacked two of the AVI's, I would love to be me hands on a C9.25....
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Saturn/Saturn20060209.jpg)
Overall I think the Vien is ok, but it lacks in finer detail, also those secondary supports do very interesting things to the AVI's like noise images? And the raw files are a little blue. If I get this 100% collimated and we get a clear night I should be able to get an image to the quality of the LX90, well nearly anyway.
Also Mike, I put Saturn in the middle of the cross hairs on K3CCD and alighned the mount better and it had no problem staying on the chip for 20 minute plus, un-guided, and the PE cycle seems to be about 8.5 minutes as wel, quite good eh!