Hey everyone. I'm pretty new to wakesurfing, and just bought an Obrien Alias. I was going to get a broadcast, but for the price difference, i went with the obrien. Its a 4'6" board. Anyways, it came with a 1.75" fin, and it can be mounted with 2 different sets of holes.....one that puts the fin farther forward, one farther back. Which is best? What are the advantages of each setup? I'm about 165lbs, and will be riding it on a fairly small wake. Thanks!