Okay, let’s tackle this. So David Dilley has a broad range of skills, including engineering, project management, and manufacturing. His experience in the automotive and aerospace industries is notable. Location is Royal Oak, Michigan, which is in the Detroit area, known for its automotive industry. Considering his skill set and location, I'd estimate his hourly rate to be around $125, which is slightly below average for an engineer with his experience and skills in the Detroit area. This rate is also lower than what senior engineers or those with more specialized skills might charge. However, it's still a competitive rate for someone with his background and experience.