You can test CDC device on Linux, OS X (before 10.11) or older windows. Linux and OS X will not ask for any drivers, and inf file for Win will be enough. if your device is working fine (regarding CDC) with 4 MHz XT2, it will work with 32 MHz XT2 with same Win drivers (inf file). There is no need to generate new driver (inf file) because of changed XT2.
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