I had one of the last Ken Ruth converted. The lenses are from the height of Kodak's powers, post WWII, when they were the highest quality optical company (left) in the world. This carried them into the 60s. Unlike modern medium format Zeiss/Mamiya you're getting a really smooth yet sharp rendition that still has a nice pop. The 1950s Commercial Ektars were great (shutters, not so much).
It's really a study in reverse ergonomics, making the camera as clumsy and awkward as possible. When you press the shutter you are pushing a lever attached to a pivoting ball head (your hand) and need to keep shutter speeds higher than normal lest you get shake. The magnified rangefinder is amazing if you can sight what it is centered on.
Personally I think it was the German emigres who formulated and ground the glass while some diesel mechanics did the body.
Have fun. Sometimes I like making photography more difficult but not all the time ;-p