I think another important thing to consider is the thickness of your Stainless Steel Rods that hold the glass up.
You can play with Flat Stainless Steel bars that will make the folds wider and really cool tooo, (and how far apart will make a big difference or what angle you place them) and if you do not want the stainless steel mandrels to bend (I keep it at a lower temp for the glass and the metal) and fall into your piece, use 1/4 inch stainless steel rods. Experiment and have fun.
Also keep in mind your finished design. Do you want it thick enough to saw top to bottom . How do you want the colours to blend so that when you saw through them you get a nice transition. Plan it out before you begin and think of it 3-D in your mind and how it will flow , and this will help you to set it up.