This is what a spring-reverb from a GEM F-10 organ sounds like: http://martin.silvercircle.se/ljud/gemf10reverb.mp3 The reverbtank and the drivecircuit were snatched by me when I and a friend built a combo from an ordinary organ. The GEM F-10 is from the swinging 60´s. And the question: Is there any organ with a built-in tape-delay? :) /Martin