I never seem to be free of problems!
Lee has sorted the telescope and is now excellently collimated. Thanks Lee.
Whilst guiding in PHD the Dec line in the graph moved south and never came back no matter what adjustments I made. I checked the cables but they were not snagging. Any ideas anyone?
The image is just a test of 2x6mins in Ha to show the optics are now perfect but you can see the drift in the star shape. This got worse in subsequent exposures.