I believe the CX was a later improved model. But I keep my Oro's oiled with heavy motor oil and they run smooth and quiet. And to me they look more period correct, esp. with an Oro chain. Josh Berger Bronx, NY USA _cino1947@aol.com_ (mailto:cino1947@aol.com) **************Great Deals on Dell Laptops. Starting at $499. (http://pr.atwola.com/promoclk/100000075x1217883258x1201191827/aol?redir=http://ad.doubleclick. net/clk;211531132;33070124;e)