It was very skittish when braking hard from high speed. The back straight at Hullavington is about 120mph before the left hander and under hard braking the back felt as though it wanted to break loose. Just the fitting of the rear wing cured that and the other BIG difference was the splitter. We have an alloy diffuser but haven't got around to fitting it yet. One day soon??? The car was a little lively before the aero. It is so well planted now that altering the wing might not produce anything better. The grass is not always greener on the other side. However we might experiment in small doses just to see what happens. A slightly deeper wing is available from the same source so that could be a starting point.