Jeff and Jessica Westcott, founders of Westcott Designs(R) in Phoenix, Arizona, have a straightforward philosophy when it comes to upfitting Toyota trucks and SUVs: They must be in harmony with the vehicle and enhance the owner's experience without compromising the vehicle's engineering benchmarks. Westcott knows Toyota trucks from his years upfitting vehicles on the point-of-sale frontline at Toyota dealerships. Those years opened his eyes to the wide range of products available. He tapped this experience when...