I am currently engineering my v2 version of my f1 in schools car, it is a small scale car powered by a co2 cartridge designed to go down a 25m track, my current version does 25m in under 1.4s, however, I would like to shave off another 0.3-0.2s I believe my main issues are the bearings (only ceramic hybrids) and the weight. It weights about 70g I believe. I have attached pictures of the model and the one I am currently designing to be CNC'd. Will taking material off the side of the body underneath improve speed, any tips? https://i.gyazo.com/d10bb98329a639e96fbd9d942d0da553.png https://i.gyazo.com/dd0c44a7416831d6905dab4849031632.png https://i.gyazo.com/b4f70659cfef30fe55607dee724c5fd3.png As you can see on the second model the front wing has a little funnel to direct the air into the under slot, should I place the wheel as high or low as possible?