I only just saw this thread. I'm not sure how a CE-2 would sound with a purely sine wave modulation. I think it might ened up sounding a little lop sided because the peaks and valleys would be much more drawn out.
However, this is DIY so all ideas are a good starting point. My suggestion is to take a different approach and maybe adapt one of the Electric Druid microcontrollers to be the modulation engine. Then you could use all sorts of different wave types, not just sine and triangle. Take a look at the Flangelicious project and consider how you might have to work it into a chorus design. It might require a BBD with extra stages, or some other wizadry.
However, this is DIY so all ideas are a good starting point. My suggestion is to take a different approach and maybe adapt one of the Electric Druid microcontrollers to be the modulation engine. Then you could use all sorts of different wave types, not just sine and triangle. Take a look at the Flangelicious project and consider how you might have to work it into a chorus design. It might require a BBD with extra stages, or some other wizadry.