I was fortunate to play in a few of those qualifiers, plus a Met Open years ago. The North is a stern Charles Alison with some very tricky greens. I definitely beat the field keeping the ball short on 12,16, and 17 due to serious green severity. They can get the greens very firm with a 12 stip=automatic 3 putt from above on the above mentioned greens. Not sure why, but on the par 5 8th, a lot of balls go OB left when going for green in 2. I find that green pretty tough for an up and down, so I always layed up, you probably need to be close enough to hit a towering hybrid or less. The South greens are mostly Rees, and the original ones are not too tricky. South is the course that should be eaten up, and the North requires patience.