I play the SK2 and have a Leslie IV Combo preamp and a Leslie HL822 (11 pin connector). I would like to control the Leslie through the 8 pin Leslie connector on the keyboard and I would like to build the interface myself. A box XM-11 exists, but I could not find the schematic anywhere, though it apparently can be downloaded from the Hammond web. Do any of you have the schematic? anyone with tips regarding this challenge?