The base looked pretty weak to me after printing it, but after putting it all together and then mounting it on the stick shift, it fit beautifully. At the beginning, I did not understand how to fit the three parts together, as the instructions were not very clear to me. After toying with it I realized that the top has a railing for the middle movement part and then the bottom just sits under. They have to be united by a screw (M2x10) which I actually also printed (https://www.thingiverse.com/thing:3402887) and it has work wonders.
I know there is a stiffer version but I like this one.