If your not comfortable running the top, then don't run it. The bottom is always close to if not faster then the top in the Non-Winged 410s and if you can be consistent on the bottom, you will do just fine. When running the top, you will need to slide up to the cushion. You can not enter on the cushion because you will just fall over, but the less you slide the car on entry, the faster you will be but the higher the chances of you going over the edge of the track are. be sure to get back into the gas before the car completely sets into the corner, this will help you control the amount the car slides.