Personally , I'd avoid the headache of paper tuning first and I'd start with bare shaft tuning from 10 - 30 yards to get a good indication if you have the correct arrow spine or not.

Take three fletched arrows and three un-fletched arrows (field points only). Shoot three fletched arrows into a small group (whatever distance you can achieve this consistantly) then shoot the three un-fletched arrows into the same group. If the un-fletched arrows impact to the right of the fletched arrows you have a weak spine. If they impact to the left you have a heavy spine.
You can also use this procedure to get your nock height correct.
If your un-fletched arrows impact above your fletched shafts then your nock point is too low. If they impact below then your nock point is too high.

Above info is assuming your a right handed shooter.