I was watching some drives on you tube and many of the top players were getting alot of their hand over the top of the disc. I have always pulled my hand a little more under the disc, somewhat stacking my fingers underneath, with my index pulling the rim into my hand. I was messing around with it, and it seems like keeping more hand over the top of the disc gives the throw more stability and a more natural flat angle of release. It also gives the wrist more range of motion and leverage for dictating the angle of the nose upon release. One more thing I noticed while using this technique was that the reach back did not put as much a strain (tightness) on the tendons and muscles of the shoulder girdle and the upper arm. The thing is, I have been told by some different people that I should throw with my palm facing more up (resuting from more hand under the disc, as opposed to on top). However, when I use a technique favoring the bottom of the disc, it seems like I pull the disc through with the nose up more often.