Hi!
We've wanted to share our project based on 20x20 extrusion profiles + 3d prints:
Hackable DIY rig for Biostar TB250-BTC D+You need to buy 20x20 extrusions, few screws and nuts for them.
We've been using this project for about 1 month now with 8xRX570 and we're very happy how it's performance.
At link above you'll find tutorial how to build complete frame from scratch
We'll be happy to hear what you think about it!

