Well, I have to say, I am pleased. I have finally designed, printed and assembled my first 'thing' with my 3d Printer. Oh, i have printed a lot of things that I downloaded, but this is the first object that I designed from the ground up.
What is it? Why it's a brush holder. I had an older one I made from wood, but I always found it a bit... lacking. Oh it worked just fine, but it only held a few brushes and it was kind of a kludge, all things being equal.
So, off the Sketchup and Blender I went. It took a while to knock the design up the way I wanted it, but in the end, it came out just the way I wanted it.

What does it do? It holds brushes when I am painting. I have never been good at holding brushes in my hand for 2 and 3 brush blends, so this helps out there quite a bit. It also holds the brushes horizontally while they dry. While storing them in a cup is completely viable, I have heard from really good painters that storing them horizontally helps keep the water from building up in the ferule and causing premature rot and other bad things.
I designed the ends with holes for nails or small screws, but I ended up gluing them to my base after all was said and done. I also used offsets on each end so that you can 'stack' 2 or more of them to create even bigger holders. I actually printed 4 of them so I could make a double stack. I may make another for some other brushes I have around as well :) Here is the whole thing in pictures;
The finished, printed items. Very nice even at normal resolution. I didn't even think about fine resolution since printing 2 at a time was about an hour and forty five minutes.
A side view, showing the way they interlock.