I've used computer w&b programs to explore loading configurations, and experiment with different loads to see what will happen when I move something from here to there.
That's why I developed
this one for the R22 and
this one for the R44. I also have one for the Mariner. Where I trained, most students didn't do W&B except before cross country flights or check rides, even though we had several instructors pushing 220+. And the W&B data sheets the school provided had some problems (like somebody changing the arm or moment in the template). Since I made a habit of doing W&B before every flight, it made sense to make the spreadsheets, and then figured out that they could be pretty useful learning tools--like, which helicopter can I fly in with my 235 lb instructor...?