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Looks very good Dennis,
I have just knocked up a three triangle hartmann mask from the instructions on the Paul Russell, IIS projects pages and it works like a treat!
I drew it up on a piece of A4 (my scope is only 130mm after all) and then scanned it, painted the white areas black in photoshop, printed, laminated it, cut out the triangles and attached it with velcro to the aperture (I have a ring around the opening for a light shroud using vinyl from Clark rubber)
Focusing is now a complete DODDLE! Woooohooo!
Thanks for the inspiration, I might endeavour to make one of these later on, however the basic three triangle one took me all of 10 minutes and a compass/ruler, no CAD required.
Cheers
Chris
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