I did this in the past with Repsnapper, before I learned how to make SF work with my machine. Setting the layer rotation to 72' would produce a pentagonal pattern in my fill. Setting a 1' roatation and 100% fill would create a spiral look in the parts.
I've tried this in SF, but I only get 0' and 72', and then is repeats. Is there a setting I'm missing? Thanks!