Ideally you should Proofhide it quite a few times, buffing it after it dries each time like the instructions say. Yes it will SEEM to make it smoother but it will actually be LESS slippery after being proofh'ed a few times, believe me. During the first few weeks, the more you proofhide the better.

Assuming you have the saddle leveled well at this point...

For me, I felt more comfortable with the saddle BACK in it's rails all the way, becasue it pulled my center of gravity back more and took some weight off my hands. I was able to feel better balanced all over with my saddle back on the rails, not pushed forward. It also brought my weight centered BACK onto my sitbones more (and OFF the saddle nose). Gave me more pedaling power too.