I've always used automatic for simplicity's sake, but recenty I tried out manual. I thought it was a lot of fun, and I definitely felt like I was accelerating faster and avoiding going into lower gears when I didn't want to, which helped my times. But I also am not really sure when one is supposed to downshift. Is there any rule of thumb to this? I think if I could get downshifting down, then I'd have some good times. Thanks guys.