Btw Michael, in case you want to know how MTs work in this game, you need to drift for a specific amount of frames to get an MT loaded. The time is around 1 second that you need to drift and steer (R + D-Pad either left or right). You need to drift continously or else the MT loading will reset to 0. However, ZZMT, as Leone already mentioned, makes it possible to steer to the other direction within a drift, as you file down the d-pads middle point (or you are lucky and got a natural ZZMT d-pad like me

), so that the game doesn't register a change of the original direction you chose to start the drift.
As an example: Let's say you start a right faced drift = R+RIGHTIn case of Non-ZZMT:You keep the drift for enough frames:
Sucessful MTYou do not keep the drift long enough or change the direction before it's fully loaded:
No MTIn case of ZZMT: You keep the drift long enough: Successful MT
You steer to the other direction and drift long enough (let's say R+RIGHT>LEFT>RIGHT:
Successful MTYou steer to the other direction but do not hold the drift long enough (same example as above, but in a shorter timespan):
No MTYou load the MT with a R+RIGHT>LEFT>RIGHT>LEFT movement, but hit the sand/grass inbetween:
No MT (unless: a grass/sand hit can kill the MT, in rare cases, for example retro Mario Circuit 4 at the 2nd last U-Turn of the lap you can drive through the sand without killing the MT, just getting a pretty hard slowdown)
The most efficent way is to not hit grass/sand at all of course, but especially this corner is a killer and for not so advanced players I'd recommend using the slowdown-way. How much you need to not get the MT after a sand hit I can't say exactly, but only a short hit can be enough, so beware the offroad!

Hope this explains a bit and makes you understand the whole thing a bit better in the later phases

ofc you can always ask if you are curious about anything you don't understand^^