The shoulder blade and the upper arm should be approx. of equal length with the shoulder blade cutting the topline at 45 degrees.

The distance from the withers to the elbow is equal to the distance from the elbow to ground - i.e. the lower leg from ground to the elbow is 50% of the distance from ground to withers. A vertical line should be able to be drawn from the withers to the rear of the elbow.

Well boned does not mean heavy boned.

The shape of the front leg (including sinews and muscle) looked at in cross-section, should be oval, not round.