More seriously we learnt a few things:-
One of the cars (mine of course) regularly came off at one XLC by apparently hitting the plastic point in the middle of the X. My competitor never used that LC. After some trials it became clear that it was my car. It became apparent that after a few thousand laps the guide had worn back about 0.5mm and had some londitudinal wear lines. Basically it looked slightly worn , but very little really. Nontheless the guide was replaced and the difference remarcable. Before there was always a "tap" sound as it passed the X even if it did work. Now it crossed reliably and quietly. So beware guides. However not too bad as I guess we are talking 30 to 40 hrs life for the guide.
First race had a problem re-fueling, we got a track call every time sombody re-fuled. (ps still on 5.4 must upgrade). Found out that refuel time set to 0.5 sec low throttle as was track call. Re set track call to 1 sec and problem went away. Not for us a perfect solution as often when we crash we block the other lane so the delay does not neccessarily bring universal benerfit to the none crashing racers. However it is a very minor irritent. I wounder if this could shed any light on the "pit calls on the straight type issue".