How to sync contacts with Mozilla Thunderbird and Google

I'm using MDaemon 16, Mozilla Thunderbird 68.4 and Google Contacts
I set up Thunderbird to sync the address book with Google using gContactSync (and it's working very well)
What it's missing here is sync between Thunderbird OR Google AND MDaemon and I couldn't find a way to do this.

I'm aware that MDaemon 16 can use CarDAV to sync contacts and it can do it with Thunderbird using SOGo or CardBook estensions (KB: https://bit.ly/35VmbNX and https://bit.ly/36ZrmOf)

The problem is that none of the two allow to sync both MD, Thunderbird and Google. And both SOGo and CardBook have bugs or disadvantages.

The current (latest) version of SOGo has a bug that prevent you to add contacts to TB address book once it is installed. Further, in some cases it produces duplicated contacts when copying them from the TB standard address book. There is a bug issued for this (https://sogo.nu/bugs/view.php?id=4916)

CardBook works quite well, but has a problem because gContactSync doesn't see its addressbook, so it can't be synced.

So, AFAIK there is no option currently for 3-way-sync as described.
Is there something I'm missing? Any 100% working solution for the above scenario?