Those "body diodes" aren't acceptable as flyback diodes
Thanks for your clarification! I appreciate it.
To make sure I understand your suggestion: The arrangement you suggest is exactly the same arrangement that the body diodes is providing, right? Your suggestion is that the body diodes are poor performance as flyback diodes, and I should double them up with something better?
Can I use some 1N4001s? Do I need a high-voltage Schottky? Something else?
I have noticed that some motors I've, ahem, "destructively analyzed" in the past have had capacitors across the poles. Is that a good idea? How should I match up the capacitance to the motor and PWM frequency if that's the case? What max voltage is needed? (I have a 250 V 1 uF film capacitor around here somewhere... and a slew of 50V 0.1 uF ceramics for decoupling)