Looking for Sizes of Screens

[Parlyle]

I'm looking for the screen size of the Sammy DLP Screens. I bought a BDI stand for a future HL-P5674W (I hope) and wanted to find out if the "sweet spot" is too low. We will be viewing from 9 feet and 12 feet and our eyeballs are about 35" from the floor sitting in those chairs. Is there anybody, anywhere that knows this measurement? Thanks for the info:
Lyle

 

[DarrellP]

Hopefully this will help: I have a projector and the recommended eyeball spot on the screen is 1/3 of the way up the screen, it may be different with your set.