High-precision, ultra-light tracking detector systems are needed in present and future HEP experiments. Forum on Tracking Detector Mechanics, held annually since 5 years, is a 3-day event focusing on mechanics and cooling challenges, solutions and lessons from various Tracker projects at CERN and elsewhere. In this Detector Seminar we will highlight key topics and findings from this year’s Forum, held in Bonn on May 23-25.