Just to make a slight point, but knowing my dad's game, if he's playing the tips, he wont be able to reach 4 out of the 10 par 4's in two. Some of the other par 4's, he will be hitting 3-wood or 7-woods. Since i think the discussion on playing the right tee's for the player comes up a lot here, wouldn't it be prudent to move those who hit it shorter up to shorter tees. They have there own slope and rating as well, so handicaps should match. Cause if not, then i could easily say my dad's handicap jumps 5-7 strokes from this tee set. He usually plays 5900-6300 yard courses.
Just a heads up, cause i know picking the correct yardage for ability and overall player ability to hit distance is important to enjoyability and fairness.
For his game, looking at the score card, he can handle the 6500. I am just saying that giving him a shot to actually play a par 4 as a par 4 instead of a par 5. If he played the 6500 yard tees, he would only lack distance for par 4 on one of the par 4's.