The toes arched and well closed. The pads thick and elastic. Nails dark and strong. I think we can all agree to the importance of solid bone and muscle. Too heavy, and you lose agility and speed.
Moderation is the key.
The issue of Shoulder Angulation has always intrigued me. That's something to think about. Sounds good, and I agree that we don't want to see rickets. If anything will make or break a working dog, it is the quality and character of his feet. Good strong nails are preferable to weak, splintery nails.