Thanks Nik, funny you should mention cooling. I just fitted a MUCH larger radiator two weeks ago as it happens. The standard one really couldn't hack it and I was seeing temps over 100 degrees if I cruised at over 90mph!
With new ProAlloy rad temps did not go over 87 even hooning around Silverstone last week!
I know Nitrous works and if I was dragging the car or competing with it then I would definately use it. but its a road car really and I just want a bit more power...
will search for cooling mods of gearbox, thanks.