This will probably be blinkin obvious, but if you have a live, driven axle, does it make the slightest bit of difference where, along the axle, you put your brake disc?
I know this may seem an absurd question (I know I'd think so if someone else asked it) but can the kart slew sideways if the shaft is grabbed at the end rather than in the middle, or does it make no difference at all because the shaft is the shaft is the shaft....all the way along its length?