Drag Racing Practice Tree 1/25/2018 8:15am Rollout Prestage Hold GO! to Stage and release to launch Your Reaction: Last 10 Empty. Delay Box: Crosstalk: Other Trees: Sportsman (0.500) Pro (0.400) Pro (0.500) Four Wide (0.400) The default settings will give you a pro tree, 0.400, with no handicap. Customize as desired. First click . Then hold the button down for the lane you are racing. Let go of the button to launch the car! 0.000 is PERFECT!