Done: https://github.com/movermeyer/rbco.caseclasses/pull/1
https://github.com/rafaelbco/rbco.caseclasses/pull/3
It looks like that even pinning the latest funcsigs it is working properly!
Only thing it does not detect missing blob files but it is probably built to work the other way around (i.e. given the file find the stuff in the ZODB).