Hate to damage your illusions Genghis the Engineer, but some of the best instructors that I have come accross (at PPL level) have been CPL with ATPL level knowledge and only a few hundred hours!!! and only 4 or 5 types to their name!!!
By the way, I operate from an aerodrome that also has microlight operations, so I experience on a daily basis the level of their flying & airmanship-I won't expand on this point but the aerodrome records of incidents speak volumes!!!