Phil thank you for posting this (and Vekke for the PDF) but my left-brained art student logic is having trouble connecting the dots. Since the fronts of production cars are decidedly not template, and the boattails we build from them will not start at the 30% mark like the template does, how do we interpret the % points you posted? Also, is there a way to modify the baseline to fit our specific vehicles? I'd like to know how much I can get from 24" - 36" - 50" boat tails. (with 13* angles I can do a 100% tail and still lie within the length of a Ford F150 swb crew cab!) Thanks again for putting up with my relentless questions