Thanks guys much appreciated.
Greg, I got the same figure for calculation. Although I have read in one of the manuals that anywhere around 0.25 of the correct scale will be find for astrometic calculations.
I also got the USNO A2.0 database from Marcus too
. I did read on another forum though that greater success rates for plate solving are gained when only one data base is selected. Incidently did you select it by Data/file locations/data applications/core data bases and then in stellar options? Then saving the settings?
I honestly cannot see how I could get my PA any better now though after doing it myself with drift alignment. 20 minutes per star and nill movement is pretty good but I stand to be corrected if you think I can get better than that.
Gary, I will probably do the six star model once I get this adjustment sorted out. Thanks for the suggestions.
Marcus, I think it might be either the spring plunger or the locking bolt located up in the top of the mount. I need to remove the side plates (fortunately I removed the 6 little allen screws on those plates for future access so my PA will not be affected) and take a good look around. Brad is going to organise what adjustments will be need via PDF once I figure out where the problem really lies. There is a PDF on my way for checking of the RA slop to ensure the bearings are in correct tension. I have access via a mate here to any type of tension wrenches or vernier gauges that I should need. Spent plenty of time rebuilding motors in my petrol head days so I know all about tight tolerances. Having already taken a good look around inside one of these mounts they look pretty simplistic and yet have such good performance.
One this is for sure I will report back what is up with the mount and how it got fixed. It might be instructive to others to know how to fix similar problems.