I used the CP-251 for adding a second LFO to the Voyager. As always, I must have simultaneous PWM and vibrato, but at different rates. The module did this well, but - as I also surprisingly found with the Voyager's Oscillator Frequency knobs - the slightest touch effected the setting, so that it was difficult to get it just where I wanted it.
And yes, that's a Hammond XK 3c. It, too, was a beautiful instrument, but I just couldn't stand the sonic associations. Whatever they were - bars, Jazz clubs, soap operas, skating rinks - I couldn't stand them. They killed the dignity of my sound. And it was sooooo seventies-ish. Contrary to my reputation around here, I am the antithesis of nostalgia. I don't want even a hint of it my music, and the Hammond is the sound that most rings with 70's and 80's nostalgia. From the day it arrived at my old third-floor apartment, that organ didn't stand a chance with me.