I am sure P' Lux has much more experience than I do, and the machine you drove on that event was quite extraordinary. There were rumours that you were tailgating and giving lots of pressure to other track cars. Not only the car sounds mean, its also really fast, I remember it take off from Crystal Place after a small E28 meet and I couldn't keep up with it at all. I think it was P Krong who drove it that day, but anyway that triggered me and totally inspired me to use E28 as track car.
But my major obstacle in doing so is that I can't bear to see a car that goes way back with lots of memories that I inherited from my family turn into a track car with roll bars, no a/c, no seats, etc.
P Lux krub, by any chance do you still have the camshaft that came with the M20 S5?