As regards the 180mm issue: which model lens? The early ones with the Seikosha-MX shutters will have trouble on the C330 series. The cocking arm is the usual problem, since the position and angle of travel varies compared to later versions.
Seiko (black) lenses should be fine. The two long lenses (180 and 250) use a lightly sprung extension to reach the cocking and tripping levers. Generally these don't cause any problems.
Lee: There's a PDF version of the files at https://webfiles.berkeley.edu/~grahamp/mfaq/m_faq.pdf which might be easier to search. I might redo the FAQ, but I want to see how popular Han Verhulst's forthcoming book on the Mamiya twins turns out. It may make my pages redundant. What particular navigation issues do you have?