I use Yamaha's Style Assembly part of Style Creator for most of my style making...I can always find an appropriate part in another style that will work for me, plus the note limits and NTR are are already done for you, so no problem with chords.

Most of my "work styles" have as many as 7 variations, as I use the intros as new variations.

The other part of Style Creator I use a fair bit is the Groove & Dynamics, which is great for adding a swing feel to a style, or, for matching up parts from two different types of style (swing and 8 beat for example).

Using Yamaha's Style Creator as described above is pretty easy to do...I usually cover it in my follow-up clinics.

Ian