Spyders have a specification for the toe in of 0.0° with a tolerance of ±0.2°. If the toe in is set to zero degrees static, then the front wheels can/will point out during cornering and at speed. This toe out condition makes the wander, and sometimes dart depending on road condition. To make matters worse, your dealer can send the bike out the door with a toe out condition of 0.2°, wandering like crazy, and still call it "In Spec".
The ROLO laser alignment calls for additional toe in, which stabilizes the bike and makes it track straighter over the road imperfections. Factory uses degrees across the rim, the ROLO system uses inches at (I believe) 72" from the rime center. I don't have the math to make the conversion, but my bike wandered into SpyderPops with 3/8" of ROLO measurement, and rode out like it was on rails with about 1" of toe in, and increase of 5/8" at 72". Not that much in degrees I think, but makes it track great.