Smokey - I knew the pit lane system used the ground loops but I thought the set up opportunities were just using the radar system during the one or two sessions when we were sent out through the pitlane from parc ferme rather than at the top of the pitlane or from the bottom of the pitlane itself.  My bikes were not fitted with a speed limiter - I just used the read out from the radar and went through at about 50 - 55kmh.  Looking back on the data we were in the top 2 or 3 pit stop times - pity that wasn't reflected in the race results !