Hello Lowboy, The Cathedral Pedal is basically a stomp box. I first used it with my Kurzweil then started experimenting with it on my Hammond 44 and Hammond BB melodicas. I used to have a lot of rack effects but have sold them all for the exception of my Master-room XL 305 spring reverb that is now in my daughters studio. I did not used many of them for years and I want to be able to carry all my effects in a small pedal board briefcase instead of a heavy flight case.
Here is a link to the Cathedral pedal http://www.ehx.com/products/cathedral