I've tried plenty of leslie clones, univibes,and chorus pedals for a rotating speaker sound, but I think I am chasing the wrong thing. I LOVE the organ sound on the Spencer Davis Group's "Gimmie Some Lovin". I think it is a Hammond B3, but I might be wrong. The pedals I've tried (H&K Rotosphere, Visual Sound H20, Fulltone Deja Vibe, EHX Wiggler, either seem to have a brittle high end or miss the low frequency chug. Does anyone make a close approximation of a B3? Let me know if you need clarification of what I'm trying to get across.