There is at least on computer that lets you adjust your mileage so you can sync it with the cue sheet, but I don't know which one. The problem with that is that you then loose track of how far you have actually gone.

I've found that after some distance, my odometer isn't matching the cue sheet anyways, so I've learned to just keep an offset in my head and add or subtract it from whatever the cue sheet says. On my last brevet, after 200 miles my computer was showing about a mile and a half lower than the cue sheet, so I'd just subtract 1.5 miles from whatever the sheet said. Sometimes that simple math can get challenging after 20+ hours on the road, but it's not too bad.

Keith