Join Date: Feb 2000
Location: Ontario, Canada
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I can't help with your tech questions -- but I can offer my opinion on screen material.
Both Draper and DaLite will send samples if you ask. Draper had an email address on their website that they accepted my request from, and DaLite had a 1-800 number.
I got a sample of both the M1300 and the CinemaVision. The CinemaVision had visible sparkles -- and I decided that as nearly invisible they were, I'd know they were there and opted for the M1300.
However, when my M1300 came it was _folded_ (sigh, apparently you can request it come rolled on a core). And the actual material that arrived is not 100% identical to the sample (but its still a great screen).
I'm using an 80" wide screen as well, but in a 16:9 aspect ratio.
So I've got no sparkles, but slight fold marks still.