Collimation of this fast instrument is slowly coming together. Here is the latest CCD inspector result. The stars look excellent in all corners so it helped to precisely measure the tilt changes with a depth guage. Finally, I used FWHM readings in each corner of the STL 11000 image to determine in or out changes on the tilt plate. And the adjustments are very subtle.
http://img846.imageshack.us/img846/1...ectorrh200.jpg
I think I am ready for some real serious imaging but I am still tracking down a differential flexure problem at 20 minute exposures. 5, 10 minutes are perfect.