I have always adjusted mine myself.You just have to make sure you adjust them both the same amount.maybe one full turn each and check the poundage to see what you have.Try marking them both and turning them both the same amount this should keep it pretty well in sync.As for paper tuning again.I would run a copuple arrows through paper just to be on the safe side.The string wont change from side to side.But it may move just a tad up or down depending on how much you let off of the poundage.So yes I would deffinately paper tune it again just to make sure.