Dwight's right...experience is your best route. Talk with Bob at Toledo Sewing Machine. Aside from purchasing my CB3200 from him, he hooked me up with a servo motor for a 1940 manufactured Singer 31-15 a few years back...along with a few other parts & pieces I needed to get'er running good for canvas/cloth/etc. Plus, Bob's a frequent contributor to these forums with his extensive expertise. Call 'em up on the phone...there'll be no regrets.