User blog comment:Sirebel/Mathematician Required - Apply Within/@comment-27170954-20170523122715/@comment-26829117-20170523155907

A full analysis revealed one example :

Porsche 911 Carrera 2 Speedster (1993) Engine Upgrade Level 4 - PR delta 0.5, all other deltas 0.6 or 0.7. I'll check this tonight as it might be an error.