It does seem like it makes sense to allow the user to limit both source and destimation parts / MTs / magnets. As I mentioned in earlier post, a comprehensive analysis examining all the hundred-plus magnets I have on my figures would take too long.

In terms of the scope of what I personally am looking/hoping for, it is analysis of the effect of the movement of a representative body part (say, the chest) on a small, selected set of magnets (or MTs). Sticking with the chest to breasts example, the chest is the next upstream part, and it's movement already captures by proxy all the motions of parts which are upstream of the chest (as long as we're assessing the chest part's motion through absolute space, which I take it we are). Once this motion is analyzed, I only need to apply it to magnets (or MTs... but I use magnets) which are attached to, or downstream of, the chest.

If I want to also analyze the same animation to get the swinging of a figure's earrings, I would just re-run the script targeting the head. This would actually allow the head and chest movements to differently affect their respective children parts / props.

Saving the analysis in a DAT file is a great idea and major potential time-saver. This would let me run the analysis just once for any given animation / body part combination. I have no problem with the idea of re-running the analysis for any new animation / body part combination. I would just create a library of DAT files.

Looking way ahead, my own personal ultimate Jiggles script would be a one-button operation which has fixed settings for Grav, Damp, Twang, target magnets, Sec, CPS, and Multiplier; all of which I would define once I had found the optimal settings for a given set of source and destination parts (i.e, one 1-button script for breast movement, one for earrings swinging, etc). So I would select head or chest and invoke the relevant one-button script and --Presto-- I come back a half hour later and the breast magnets or earring magnets are all animated. But even if that approach isn't feasible, the dialogue box approach is still fabulous!