Hey Rick. The tutorial was from the PI website. I followed all the steps manually......I think I found the solution though. There's tick box under the master dark and master bias which reads "calibrate" or "optimise" after a bit of playing around I for it worked when the "calibrate" boxes were ticked.
Thanks for the offer, that would be great
I'm happy with my darks, but something is not sitting right with the bias, the master looks too "clean"?
I'll dropbox them and PM you the link when they're done
Erik