Depends on his speed and rev rate really. The most aggressive full roller drill for me is pin and C.G.in a 7:30 direction (I'm a righty) pin 3&3/8 to center of grip.My speed is only 13.5 -14 mph,but axis rotation is 90 degrees. Because of my slower speed I like to put the pin and C.G.in a 10:30 direction with the pin 2" to center of grip. Putting the pin and C.G. in a 10:30 direction is the tamest drill you can use for a full roller. If you put the pin in a 9:00 o'clock direction it is a middle of the road drill.You would want to reverse pin placements for a lefty (i.e.4:30=most aggressive,3:00=middle of the road,1:30=least aggressive.You can also vary the pin to center of grip from 1&1/2"=least aggressive,to 3&3/8"=most aggressive.