First of all, thanks to Aloarjr810 for the spreadsheet.  I have been looking for something like that for a long time.

Thanks.

On the 5x5 layout it is 5in from Pin to pap and 5in from CG to pap.

Note: The CG to PAP measurement is the old method.


Example (5" X 5") layout
In the old terminology before Asymmetrical balls:
A 5" X 5" meant the (Pin to PAP distance) X (CG to PAP distance)

After the introduction of Asymmetrical balls:

For Asymmetrical balls a 5"X 5" meant the (Pin to PAP distance) X (MB to PAP distance)

For Symmetrical balls a 5" X 5" meant (Pin to PAP distance) X (virtual MB to PAP distance)

Since Symmetrical ball don't have a marked Mass Bias. The virtual MB is a spot measured 6 3/4" from the Pin along a reference line drawn from the Pin through the CG.

Note:
The old terminology is still used by some, so be sure to check just which is being used.

Storm then added in the Pin buffer (which sets the VAL angle)

Storm Symmetrical drill sheet
http://www.stormbowling.com/medias/Storm_symmetrical_DI_lr.pdf

Example (4" X 4" X 2") layout
This usually refers to the Pin Buffer System:
Which is (Pin to PAP distance) X (MB to PAP distance) X (Pin to VAL distance)

Note:
When using the MB in these systems, the first two measurements must total at least 6 3/4", which is the distance from the Pin to the MB or else some combinations of measurements using this system are impossible. Example a 3"x3" Layout.