Hey all, An old space at my university has a really old control and dimming system. I have pictures of most of the dimmers but didn't get a picture of the board. The dimmers go into a couple carts (they type SDO picture) and are fed from the wall. The board has removable faders that pop in and out. Can anyone help me identify these and let me know roughly how old these are? Google is failing me right now. Thanks!