Anti Tripping Extensions for the (old) Stokke Tripp Trapp

These Extensions replace the factory feet of the Stokke Tripp Trapp high chair. I have the old version, no idea if they fit the new chairs. The Extensions prevent the chair from tripping over backwards if the kid pushes hard. Having the chair on a slippery surface helps. PLA slides well on laminate flooring. The extensions attach with two little screws (3,5x 30 mm). It is based off of a design from thingiverse, but I cannot recall the original author.