1999nov02. Ask Uncle Willy, the point man for Williams Electronics. Excellent!
The precise angle of 6.5 was determined after months of grueling clinical trials and focus groups, with biofeedback and eye- tracking equipment feeding the real-time human factors data into banks of Cray supercomputers, while GPS and NIST data were simultaneously factored in to remove any skewing due to time or place. Or maybe that was just the empirically determined angle of one machine once that “sure felt like it played well.” Uncle Willy is not sure which story to believe.