Yes I have done it, although slightly less tilt than you need. Mine is about 3 degrees.
I did a quick check with autocad and came up with 15'11" throw at 4 degrees, to get the bottom of a 59" screen 6-5/16" above the floor. So your numbers look pretty good.
I did a quick check with autocad and came up with 15'11" throw at 4 degrees, to get the bottom of a 59" screen 6-5/16" above the floor. So your numbers look pretty good.