I use a blinder....so kinda and I can go .0000 on the tree with no bumps footbraking in a car that runs 7's in the 1/8..... oh and my worse reaction time this year has been a .046 and I knew I missed it and I have had 2 .000's so far this year in 4 weeks.... during the day I'm .020-.030 at night I'm .0's-teens I'm a second generation racer so don't blow smoke up my azz saying it ain't the same all I can see is the flash of the 3rd so I'm basicly leaving off of a .500 pro tree..... I never said my car would cut a good light on a .400 pro tree maybe going way deep!!!