Just a quick note, a few nights ago I cut out the mask for an ED80 and the test results were great! The other night I printed one out on a jet ink printer using 3M transparency film (CG3480 bought at Staples) and the results were as good. Needless to say the film was much easier... no cutting!
I used 2 part epoxy to mount the film into a embroidery hoop from Clover (Art No. 8813) which fit the Orion ED80 scope.