Using Pimoroni fan shim with no software control

Just wondering whether anyone has successfully installed a Pimoroni fan shim on the current hardware (full kit) with the included metal heat sink?
Two aspects - 1) will it fit mechanically (preferably keeping the included heat sink) ?
2) when not intending to use any fan control software (i.e. just have it run continuously) does the current software manipulate a GPIO that will affect the operation of the fan?
Harry