I am of the view that a good regulatory regime and a good aircraft design can both be achieved by the same method:-
"Simplicate and add lightness"
An annual inspection and check-flight, taking typically half a day to a day
We must be doing it too well. Two and a half days is typical for us with three of us working on it. Compression check on the engine, oil and filter changes, a thorough strip out and clean, rocker covers off for a rocker pivot lug inspection, drop the lift struts for a spar inspection, spar carry through inspection, gascolator clean, contol wire and fuel pipe inspections, remove all fairings and inspection panels, go over it with a fine tooth comb and fettle anything that needs it. Timing check, remove all spark plugs, clean repaint and refit. Remove and clean wheel bearings, pack with new grease and reassemble. Check and adjust brakes. Engine ground run and airtest and do all the paperwork.
Mike