Could somebody please define the difference between "unpublished or 'home-grown' instrument let-downs" and "flying low"?
If there is no published procedure to land, there is no procedure to land. If I am performing a flight in IMC under IFR to fly low to check whether I am able to land VMC at an uncontrolled airfield, when does "let-down" begin? At a specific height, or a distance to the field, or? The pilots intention is not (yet) a measurable quantity.