i ran 4 sessions all together. 2 before lunch and 2 after lunch. There were 3 groups of 11 - 12 cars each. We had an observation lap for the guys who hadn't been to sandown before and then they let the more experienced drivers on. I finished my last session around 3pm. They even had a passenger session where you could take passengers for a few laps at slower speeds.
To be honest, for me, 4 session was plenty. I was pretty tired after all the laps I did - a total of 40 - 45 laps during the day. Even though it wasn't warm, I was pretty sweaty after each session - time to buy some nice m3 leather racing gloves
I don't think I'll make march 26th. I think that's F1 weekend and I'll be watching that a Albert Park.