all my experiences with them have been lackluster to say the least...i remember 2 use to always come out to sunshine and bradenton...the faster one would have one hell of a time getting into the 13's on a 75shot...this was back when i had the laser, i asked him if he would like to run and neglected but later in the night, we lined up and i got about 3 cars out and then he juiced it and went like 9.0@80 to my 8.8@77