This half-moon shaped switch assembly is used to control the speeds of the internal digital Leslie found in the XK-3, XK-3C, and SK-2 as well as the speeds of any Leslie speaker that is connected to the 11-pin Leslie connector found on the XK-3. This switch assembly mounts to the XK-3 front rail via the two thumbscrews provided and can easily be removed for transportation purposes. Part number CU-1