I don't trim the edges of the ears. I do,however, trim the insides first with hairdresser's scissors (extremely carefully!) and then finish off with thinning scissors.
Have you stripped him? I just started doing Holly's head and back about a year ago and got some tips from a good groomer - now that I've found one after all these years I don't need one.
(Although I might take Mac in to have his puppy fluff stripped, that's always a big job for an amateur like me.)
Our dogs, like yours, are first and foremost pets. They get groomed once a week and sometimes get a quick brush in between depending on how many "souvenirs" they bring home from their walks in the woods.