Hello I'm new to scalextric and I just bought a Ginetta racer set to start with scalextric and now I'm expanding and designing a track layout. I cannot find what are the track number include in this box with the track selector. I got 6 tracks with radius that turn 90 degrees but it's not existing in standard list. I also got 4 witch seems to be 45 degrees, with same radius, with 2 of those I have the same thing as the bigger one 90 degrees. I'm trying to figure witch track number it is. Also about the radius is that mesure, inside, outside, middle? Thanks