Welcome to Joshua!
We do also have this thread, containing a lot of Questions and Answers:
http://tentenths.com/forum/showthread.php?t=136187
Have look through it, if you have the time, I am sure you will find answer to almost all your questions, and some bonus info
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I have created this map, where you can see what part of the circuit is available, and some good viewing spots:
https://mapsengine.google.com/map/ed...Y.kP4YaI9BXO2M