Plaston metabox makes it possible to do Dewalt Tstak and Sortimo to Festool/Tanos/Macpac etc. https://www.plaston.com/en/company/news/der-schluessel-zu-noch-mehr-effizienzI’m still waiting for the day someone manufactures an adapter that allows your Festool Systainer to stack and link with other brands of tool containers.