I've recently been having a lot of fun doing various modifications to Emmett's heart gears! Learning openScad on the way :-).
So far, I've made two modifications to the AMAZING Screwless heart gears:
First, I used my old MK5 motor to motorize it!
Next, I created a Keychain version!
Haven't gotten it to print satisfactorily yet, but I will post pictures as soon as I do!
That's all for now, But I'll be making more soon!