I tuned up my PMX mount at my dark site and sacrificed some imaging time under superb conditions to get it right.
It was time well spent as the PMX is now cranking out probably 1.5 arc second guiding.
Using a super sharp AP140 and 5nm Ha astrodon filter and 20 minute subexposures at 1x1 binning on a FLI Proline 16803 this image is perhaps the sharpest image I have ever taken. This and the LRGB image have stars as low as 1.2 FWHM. I know Martin probably gets this routinely at Sierra Remote but in Aussie its not so common.
This is the Ha image;
http://www.pbase.com/gregbradley/image/159562180/large regular size
http://www.pbase.com/gregbradley/ima...62180/original largest
Have a zoom around.
Greg.