when fully modded, this thing looks rice-tastic, but it handles excellently!
Gears:
use 9 for short tracks like Autumn Ring Mini. (0'36.849 is my best time so far on this track)
use 15 for tracks with moderately long straights, like Apricot Hill (1'13.701)
use anything from 15-20 for long straights, like Sarthe II (3'49.092)