My available space is 12ft X 6ft. I've been studying smaller Carerra layouts and this is one I've been working on. It has the required pit lane, several lane changes and a lane change in front just before pit lane. It also has some area for landscape and buildings. It appears to flow nicely or at least better than the other layouts I've created. It will also have slight elevation and 2 overpasses. I think I have enough border area. What do you think?