Assuming these photos are accurate it looks like the 50C deck must have varied over the years. These photos show the 50C deck without outer front wheels.
http://ccmanuals.info/pdf/QA%2038-44...s%20Manual.pdf
However, i know i have seen photos of 50 inchers with the outer wheels,,,, I guess I am still interested to hear the setups those of you with 50" decks have.