“I have a Pibo case.
Heatsinks were added to the RPi.
The result was that the Pibow case could not accommodate the heatsinks.
This required adding additional layers to the Pibow case AND purchasing the extender bolt set.
The standard bolts supplied were not long enough to take into account the extra thickness of adding the layers.
One the Pibow case with extra layers is fitted, then add the extended bolts then trim accordingly.”