Stand for mini figures

My son collected Harry Potter Mini Figures from his x-mas calendar. He wanted to present them on a stand. The collection contains 4x6 figures. So we created this stand which consists of 4 rows with 6 pieces each.It starts with a height of 20mm for the first row, ranging up to 50mm for the last (4th) row.The attached 3mf file shows a 4x4 configuration in contrast to the attached picture. If you want to print 4x6 you need to duplicate the middle stands according to your desired configuration.The original scad files are attached as well for reference.