Kp, the prevailing wind helps the player on 13. I think that the aiming point changes a lot depending on how far you can hit it. Down wind I try to play down the right and kick off the mound. Into the wind my dad would aim 50 metres left of this line, as this is the fat part of the fairway into the wind.
Re 17: I despise this hole, a complete dog imo. From the back tee you cannot hit the ball past the centreline bunker on the left or the right. Ogilvy will hit over it, the rest of us hit short of it. It plays as a roadblock cross bunker, rather than a centreline bunker. The green is too big to make you care a out where you hit your second shot, and the contours too bland to produce any short game interest, the left side of the green excepted, of course. The greenside bunkers are probably Tue worst on the course too, and don't serve much purpose other than hiding a very unfortunately located path.