I'm glad to see others picking up 3D printed wheels as well. I've put these pictures in other threads before, but I'll put them here again.
Here's a picture of our 2011 and 2012 wheels side by side.
This is a fairly good example of what we expect our wheels to endure.
We've driven those same sets of wheels quite a few times on concrete/hard floors since, without any damage as of yet.
And to the OP; your wheels look fantastic, and I'm sure they'll work great. If you choose to continue using 3D printed wheels, I'd change some of those sharp corners to radii, it'll strengthen them a bit.
I personally hope we end up on the same field together at some point
Also, here's a sneak peek of what we've got for 2013.