I have made this fram just to crash it to trees and brickwalls. Its extremely rigid. Those arms are filled with straight carbon rowing 8x5mm on the widest parts of the arms. The middle of the frame is just one beefy chunk of forged carbon rowings and fibers. This frame can support 100kg weight with no problem and had already crashed manytimes and nothing happened to it. I am planning to make cnc aluminum standoffs for it but now it holds up even with the 3d printed parts.
https://youtu.be/-X8_FTi4obM?si=nEnCrTK6ARq0tjW_

https://www.youtube.com/embed/F7F2Rz2VQEk?si=CDS8nDFisD9wG6KA