Not for nothing, but having your broadheads and fieldpoints hit the same point of impact is not necessarily the optimum tune for either setup.

Out of a bow tuned optimally for FP flight, your BHs will impact somewhere other than the POI for the FPs
The same holds true for a bow tuned for BH flight.

Try this little exercise.

Put down the FPs alltogether.

Paper tune your bow with BHs at about 5 yards. Get a pretty good tear, does not have to be perfect.

Now perform walkback tuning with the BH tipped arrows
In case you are not farmiliar with walkback tuning, you draw a line on your target that is vertical (use a plumb line or a level to ensure it is perfectly vertical)
1) Put a mark near the top of your target and use it for an aiming point
2) Shoot 3 "good" arrows at 20 yards with your 20 yard pin
3) Shoot 3 "good" arrows at 30 yards with your 20 yardpin. Aim at the same spot as you did at 20 yards
4) Repeat at 40 and as far out as your skill or height of the target will let you without drilling an arrow into the ground

If your arrow groups scribe a line that is not vertical, you need to move the windage on your rest

If the line looks like this \ : Move your rest to the Left 1/16" or less
If the line looks like this / : Move your rest to the Right 1/16" or less

Repeat the above procedure until your groups are vertical with respect to your plumb line.

If you look at Eastons Tuning Guide (http://www.eastonarchery.com/downloa...ning_guide.zip)
They give you specific instructions for adjusting your nock point with respect to the impact of FPs and BHs

From what I have read and my personal experiences, you may have to move your nock point down a bit, or move your rest up.