Tried 2.5-2.8 spring front till last 2 finals I went to a non progressive spring felt better. Tried 7k, 8k, 9k and 10k went back to 7k. Tried M wishbone till finals H much better. T Brace till finals hole 2 and sides with 0.2 and 0.5 under/ without better. Tried anti dive (2mm FF) till finals day not too sure. Top drivers ran Ali chassis 2mm