[MTC April 2013] Proving Grounds

8 challenges of varying difficulty await you in this track.

The deadliest of them all is Challenge #3: Up-side-down 90 degree turn.

Track info:
Graphics budget: ~8200
Author's best time: ~3 minutes.
Custom music: David Guetta: Titanium
GPS: Shows trajectory through those challenges which might represent a big problem. Challenge 2 is skipped in this. Additional text hints provided.

Intro: The original intro was not being shown correctly by the game (big WTF Nadeo!), so I had to reduce it.
Outro: Yes, ~20 shots show your progress nicely.
High-quality shadows computed.

Constructive feedback greatly appreciated!