Hello azzbm, and welcome to the community!
In the section that starts with # Conversion factor: counts to micrometers, I advise implementing the standard instrument response removal so that you are sure that the conversion between counts and more used measuring units is on point. You can find an example for ObsPy here:
https://manual.raspberryshake.org/metadata.html#example-obspy-code-for-removing-response
As our FDSNWS service is currently unavailable (due to the issues described here: Live Data Issues), you will have to download and add the metadata for response removal manually. You can find more instructions on how to do so here in our manual: Metadata - Instrument Response Files
This should guarantee a correct conversion, and results that are more faithful to reality.