Every combination of movement trays/modular bases for 20mm base figures. 1x1 up to 10x10! Use the 1x1-1x10 to "update" existing trays were the first row of models (especially standard bearers!) tend to tip over. Make sure that your printbed is large enough! The squares are 20.5mm and the little walls are 0.3mm (so 10 figures is 10 x 20.5 + 11 x 0.3 = 208.3mm!). I added a 2x10 tray that fits a 200x200mm build plattform diagonally and that you can glue to another tray (2x10_connect_20mm). The .zip contains every file. Uploading pictures better than mine would be much apreciated ;)