Hi O'Lock. Could you offer some advise on the following 6 speed gearbox set up? I was unable to enter the initial settings so adjusted the final speed slider until gear 5 was 0.998 I was then able to adjust all six to match the QT spreadsheet. Testing on Grad Valley speedway which has a 1/2 mile straight and a reasonably fast entering onto the straight. All other cars I have set are up are fine but even with the final gear set to a maximum of 6.000 I'm still 750rpm short of max power rpm with this car. The above is fine as you can use the extra rpm to drag another car in a race but it must be costing a me a small amount of acceleration in a timed event. Thanks JTF.