MOSAIC M12 Meeting was hosted by Senior Flexonics on 15^th, 16^th & 17^th November 2017 at Hotel Grand La Strada in Kassel Germany. First day of meeting was dedicated to the open technical discussions, second and third days on Work Packages presentations including administrative issues. Meeting was characterized by a collaborative and proactive approach of all the participants. Special thanks to our host Senior Flexonics for the excellent organization of the meeting!