How would I keep that type of sight aligned?

Do I need a loop? Would the tru speed nok work without? Now I shoot 29" with out a loop. I don't really want to screw around with my anchor point and such again.

Edit: Say I didn't serve the peep in perfectly straight or it twisted a little so a speed nok would have to twist the string a little to line it up. If I use a drop away rest, would the string untwist and the nok affect the arrow?