Alright, so I took a stab at trying to make a challenge. I call it Roll Out the Tank!

The requirements: Single Race, A Class, Elite AI. Unity Square track. Qirex Prototype ship. Cannot use its cannon at all, only absorb for energy. You must take the elevated path (the train track) all the way to at least its final boost pad all 5 laps.

Pass: Successfully perform 2 barrel rolls each lap and 1st place
Elite Pass: Successfully perform 3 barrel rolls each lap, 1st place and equal or better than 2:55.53

Here's a vid of my attempt: https://youtu.be/PMZJ5CkzaLQ
Man, this was a pain a to do for me.