Here are a few tracks that some around the world have done
Nuburgring
http://www.oldslotracer.com/Nurburgring1.html
Targa Florio
http://www.oldslotracer.com/Targa1.html
another Florio (digital) - ie able to change lanes
http://www.slotforum.com/forums/inde...0&#entry325883
(that guy had another track that he sold to Warner Bros - you may remember Dukes of Hazzard 2 - where they were playing with a slot set
)
theres some ideas ... but instead of just trying to design something i thought get everyone to put our heads together ..
what i was thinking about was something like Zandvoordt pre 1950 GP track with the newer moto track on the inside ...