Jack I pretty much agree with your selection process but I would to say that in my opinion, undershot, long bodied or straight stifled dogs aren't necessarily what I would consider defects.

Let me explain further dogs I would define as physically challenged or lacking in structure. Dogs who are extremely out at the elbows, dogs who are severely slip hocked or dogs who are severely undershot. A slightly undershot dog is perfectly fine. A long bodied dog is fine too, but to long is not good either. When these things become a hindrance during physical activity and put the dog at a handicap to me this is undesirable.

S_B