IF that is the same as mine, I have the cover that shows what dipswitches do what. I set my initial timing at 30 degrees btdc with a degree wheel, then pulled timing that made it about the same as the OEM map as a starting point. Mine was programmed by Mark Herek when I got it. On my big twin, I think 30 degrees was too far down in the hole for the dial indicator to touch the piston (IIRC), which is why I used the degree wheel...or maybe I double checked my measurement with the wheel. I don't recall.