Just wanted to mention we just posted our Delphi Class Framework for the Couchbase SDK on our blog and GitHub. https://blog.grijjy.com/2017/01/11/working-with-big-data-databases-in-delphi-cassandra-couchbase-and-mongodb-part-2-of-3/
It is based upon the C/C++ driver. We hope you find it useful. https://github.com/grijjy/DelphiCouchbase