I have started writing a small tool that syncs files between Mendeley and the M92. At the moment it only finds all PDFs tagged with a certain keyword and copies them to the M92.
It is just little more than a proof of concept at the moment, but might be interesting for someone.
One of my goals is to actually sync annotations between Mendeley and the M92.
https://github.com/RaphaelWimmer/boox-tools