Hi Lara,

Here's my attempt, and my first post on the forums! This was a little more complicated than just a simple fillet. First, I made the fillet curve profile and swept it along the outside of the shapes wherever I could. Then, for the complicated fiddly bit where that didn't work, I intersected two pairs of curves (2nd attached image) to make some complicated rails to sweep that same profile. Once the fillet surfaces were made, I trimmed away the parts of the main shapes that weren't going to be visible. I've attached the 3dm file with the model. Ugh, it's hard to talk about 3d modeling in the abstract, hope this helps!

(PS Michael Gibson, I love working in this program!)

-Jokubart