A Rigid Rear Screen built into an RPS

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  The Draper RPS/Complete has all the features of an Adjustable RPS plus a framed rear screen attached to the structural uprights. 
  Choice of an IRUS, Vortex, Cinescreen or DiamondScreen
  Screen sizes through 6' high x 8' wide. 

The advantages of an RPS/Complete are staggering:
  Framed screen "floats" in your wall opening. 
  The wall does not bear the weight of the screen, so no finishing or reinforcement of the opening is required. Cut a rough opening and set up the system.
  Since the wall’s expansion/contraction properties do not put pressure on the screen, the result is a consistently flatter screen.
  Each element in the system is locked into its proper relationship, square with the others: screen-to-projector platform; projector platform-to-mirror; mirror-to-screen.
  Save installation time. Assemble the system, adjust the leveling feet on the base of the RPS and the entire system is level.
  Since the screen is automatically square with the mirror, installation of projector and alignment of image is made easier.