ok just drew up a couple of templates - one for Alan Meehan's ED100 and the other is a test for the C8 and the Vixen R200SS - just to see if it will work on both. Warning - the ED100 is on a4 paper and is at true size - the other is A3 paper size for the 8" scopes. I havent measured the outer diameter of the scopes yet so a little bit of poetic license was used for the outer area of the pattern. See what you think?
this version of the design took components from dennis's, a few of CN and one on the russian site, of which I included the image of here. I am not sure as to the benefit of the central mask circle, but i am sure there is an explaination as to why it might be needed?