“I couldn't (reliably) use this without a little bit of soldering (I didn't want to put the provided header on, nor solder it directly to the Pi).
I found that tinning the required pins on the shim (3,4,5,6 and 17 i think) allowed me to press-fit it onto the back side of the Pi's 40-pin connector. After screwing it down, its on there pretty solid and the buttons and LED work flawlessly.”
“Nearly every GPIO attachment occludes pin access. The ‘Button Shim’ adds switches and LED while leaving pins available for HAT, PHAT, or 3rd party board. Elegant!”
