I think the sessions worked very well as the "novice" group were able to find their own way around and settle into their own rythm and the faster guys were able ( in the most part) to get out there and have some fun without "too much" of a problem with being held up.
It was quite interesting to watch "from the sidelines" so to speak. the main thing I noticed which I was comparing to other track days etc that I have done/seen were that the 20 minute sessions were about as long as most people stay out for even on open pitlane events. 20 minute run---20 minutes to let the car and driver cool down and chance to use the loo/ have a ciggie/drink etc, then get back out on the track.
I think 3 groups would be a bit too much for an evening event and possibly even a full day as I have noticed that people don't seem to want to stay off track for too long between and after 20 minutes they are keen to get out there again.
The events that seem to work quite well are the sessioned first part and then open pitlane to end up on, as was done on tuesday night.
I know I have waffled on a bit but I suppose I am using it as a substitute for actually being able to get out there and do it.

