Found this challenge via Reddit, and promptly gave it a whirl. Or rather about fifty unsuccessful whirls and one or two good ones- this is a great course, but man that 100-degree turn in the Rush section is even more of a killer than Dead Kerbs Kurve. I have a LOT of crash footage. Video here: https://youtu.be/FvsM1RhiBrE I screwed up one or two turns, but overall easily the best run I've managed.
Done with a joystick (first time using one is KSP, usually I go WASD all the way). By my count the time was 00:01:00 to 00:07:13, for a total time of 6 minutes and 13 seconds. Two things I was unclear about though; firstly how far into the Bowl I needed to go; and secondly, does "exit the bowl vertically" mean precisely 90 degrees? I think I made about 70-80 before my roll in this run, so if I need to re-run it let me know.