I do not need access to SPI pins (see this thread) but just easy access to TB6612FNG motor controller. So I used Uno Proto shield.
- removed plastic from motor controller (with little screw driver)
- two drops of superglue mounted controller below shield
- controller now sits just above Due CPU
- controller pins are easily accessible
Why only 2 drops of superglue? In case controller gets damaged, exchanging it with a new one becomes easy.
Hermann.