my buddy and I were farming for TTs.....
I parked a runner by just before 2nd checkpoint and got out. My buddy started the race and drove to the first checkpoint (then turned around and camped just before final checkpoint) - as soon as he it it I continued race from 2nd checkpoint.
I drove the remainder of the race until I hit the 2nd to last check point of 2nd lap (then turned around to go back to my original starting point) my buddy finished the race
Rinse and repeat. Not really any new info, just spelling it out for anybody wanting an explanation of a truly fast method. 20 TTs every +/- 2mins = ~hour for the 613 necessary for