Sperp

Hi I recently. I owned a chopped Hammond M100 an a Leslie 760 with the Solton Preamp. I added a Behringer Tube Ultragain Preamp in the line bevor the Solton. But I miss the keyclick. I only hear it, when using just the lowest drawbar. Can someone advise me, what to do to increase the keyclick sound? I read about the Reussenzahn organ & groove (instead of the Behringer), what seems to be designed just for this. Does someone have experiences with this? Moreover I am not happy with the position of my tube ultragain. The distortion in that position depends of the expression pedal. If I have to play on a lower level, it vanishes. Some advices, where and how to implement it? So long Stefan