Does anyone, here, use a Prodigy P3 with a tandem axle (single brake axle) utility or car trailer? If so, can you provide some guidance on what power settings to use at specific loads/weights? (Rought eyeball is fine.) I'm asking in an effort to minimize trial/error/learning time. The Prodigy P3 manul provides some starting points but I'm hoping for something more granular and well-rounded...