i have just finished some development for mkyself.
ive got the peak dynasty with the v2 endbell,put bushes in and a 27 turn arm with medium-light spring combo and sprint brushes for 5min racing.
the arm is a monster stock arm,with the fixed timing this should be legal and be way the fastest motor.
i have tried it and its blisteringly fast.
for endurance though i should think it would out run/perform anything else.just put endurance brushes in.
Much More Racing