I still think your new wheel is awesome.
I just looked up how much it would have cost had I 3D printed my design and it was $448 for white, and $560 for black (in Canadian dollars).
I certainly can't complain about my Momo Mod 101, but I sure would have like having something in my hands of my own design. The Momo was significantly cheaper though. I'm sure I would modify the design I wanted, but doubt the price would have dropped enough to actually get it done.
You should look into a coiled cable for your buttons, like on most race cars with QR wheels. I used an old telephone coiled cable. The wires were ridiculously small but I managed to make it work.
Again, high five for an awesome wheel!