in this video, they use 3d print metal as joint for carbon tube
https://www.youtube.com/watch?v=wXY4DU8ZqA8it is a very easy way to build a chassis, however, metal 3d printing is too expensive for normal people
in this web, this carbon tube structures also can hold high loading, only need contact plate, Rivet & epoxy bonding
https://dragonplate.com/Square-CF-Tube-Structureswhat if we use both at the same time?
for more easy to see different parts, I use different color for them
a nylon x (carbon fiber nylon 3d print material) as inner joint, its strength is nearly metal and very light
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2 aluminum plate as outside joint
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special cutting make the tube connect each other, so the force can transfer between the tubes directly.
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