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.

To assemble it fully you need to 3d print:
For each row, e.g. row1: stands1_left, 4x stands1_mid, stands1_right

The original scad files are included for easier modification if necessary.