DDB just touchs on a point. I wanted to chime in on the scale thing with "Having a starting and end parameter setting, then a scale factor number of like 1-10 that is applied to the value of the start and end sizes. But then I realized that the distance between the array should be the arbitrary number as in the real world, the stone is the size that is not the variable.

So if I was a jewler creating an array on a ring, I would choose my ring shape and the "Stones" that go on it (simplified of course) and the array would be designed and adjusted by the stones. So it seems "Scale" or size at each point, would be primary, and the rest adjusts per that.

So it seems that Michael, laying out a "prebuilt size grid", then choose the size that fits the stones to be used in the array, would be more viable.

(Or was this already decided and I missed it following along)