courteneyfish:
Why don't they just make them 12 hole or 24 hole tournys. That way the average difference wouldn't be an issue.
Or simply add 1 stroke per hole to the final scorecard (9 for 9, etc.). You'd have an accurate avg for a par 72 that way. And if you want to make it a par 70, just add 8 strokes instead of 9 per 9 holes.