The Kurzweil KMR-1 sheet music stand is an optional, user-installable sheet-music holder for the PC3K8, PC3K7, PC3X, PC3(76), PC3LE8 and PC3LE7 series of instruments. Held in place by 4 back-panel screws, the KMR-1 is a convenient, space-saving alternative to traditional stand-alone designs.
Over it's production lifespan, the KMR-1 design changed. The original (no longer available) was a 2-piece design employing a separate bracket and stand. The later design is a simple 1-piece unit that bolts directly to the keyboard (no separate bracket).
Early-run PC3X models do not support the use of the KMR-1 as they lack the necessary chassis mounting attachments. To determine if your PC3X will support the KMR-1, look for 2 pairs of vertically mounted screws on the PC3X back-panel. Facing the back-panel, the left pair will be near the "P" in the PC3X logo; the right pair will be just to the left of the MIDI thru/out switch.