Loops for characteristics?

[[Do...]]

Hi all,
I am working on updating an older program that utilizes patterns for groupings of slots. The program was reporting the length of the slots incorrectly (using the default slot length); however, the drawing actually wants the length derived from the centers of the radii.

Hypothesis 1: In order to achieve this, I would need to recall the arc segments from each slot, then measure the distance between centers and map that over the patterns.
Seems to be accurate, but time consuming.

Hypothesis 2: I was also looking into using a result element and running a calculation on the pattern that way.
Example: ( getActual("Slot .479x.203 ").expansionA - getActual("Slot .479x.203 ").expansionB).
This concept would be much faster if I can come up with the right formula.

First question: If you run a formula within a result element on a pattern as described above, will it actually execute on the entirety of said pattern or just the first or last instance within the pattern? I saw an option for Loop in the formula window as well. Not sure if that would be useful for this application or not.

Second question: Is there a better and more efficient way to measure these characteristics?

* Note we do not currently have PCM

Any help would be appreciated.

Cheers,
Don

[[Ri...]]

My understanding of patterns and PCM.
When I have had PCM within a feature with a pattern or in the pattern, a prompt pops up asking if I want to run the formula or the pattern (Something close to that). The prompt question I don't recall exactly, but when you see and read it, it will make sense.