This is just how I have mine set up. I had it set up the way you were talking about for awhile, but when i changed my loop I decided to try it this way. I think I'm actually hitting a little more consitently this way, but I can't say for sure it has anything to do with the way I have things set up.
*EDIT* You have to keep in mind also that the way I have mine set up will knock off a few FPS. I'm not looking for a lightning fast bow though, just something that will get the job done. You on the other hand may be the opposite and if so, I wouldn't reccomend going this way.