Good stuff Rob.
I do not know what to do with this. Your post reminded me.
http://d1355990.i49.quadrahosting.co...01/pmotion.gif
I was comparing a DSS image to one of mine when I noticed what looks like large proper motion of one of the stars just to the left of Thors Helmet. I was really trying to see the PN, see the bottom images.
Bert