Jeff – using only 3 clipping diodes is an often used configuration. It set up what pedal builders refer to as “Asymmetrical Clipping”. There are some great articles diode clipping here: Electronics Tutorials, here: DIYStompBoxes, and here: AMZ
Those articles explain clipping quite comprehensively and certainly better than I. I suspect you may enjoy experimenting with a few different configurations before you set it in solder permanently.
All the best.