5x7 Ground glass back for Rittreck/Wista View Camera

The Rittreck View is a really nice and inexpensive Japanese view camera, which has almost all the movements and features you could possibly want when getting into serious large format photography. It can be easily found on ebay at very reasonable prices. Technically it is a 5x7 sized camera, but most of them come with either 4x5 sized backs or obsolete 6 1/2 x 8 1/2 backs.

The 4x5 back is perfectly useable and works very well, but why only shoot 4x5 when your camera is capable of a much large