I did not make one, but a bunch of them! And of a huge 15 cm length!
I've used them to make a couple of steps so my soon-to-be 2-year old can climb to his bed now that we've put away his cradle. They have different numbers of units, ranging from 2x2x4 to 2x1x1 and some of them don't have top nibbles in order to work as stepping surfaces. It works great and my boy loves it!
I had to tweak a little bit the .scad file to get a fit I liked and optional top nibbles, but not enough to consider it a remix.