Hi, I run on a home scaley track (about 10meters), and with magnets. I have a 40 ohm and a 25 ohm controller. Most of my cars like the 40 ohm best, the 25 ohm being to sensitive for good control. A few cars do need the 25 ohm though. I use red fox, which are great except sometimes the brake line beomes unreliable and needs fiddling with. Thinking of getting one of the new fly controllers...