There are still such tubes. I recall seeing a video of such a thing going together at NAHBS. They had windows cut in the tube so you could see the carbon fiber and there were little carbon fiber bits cut to fit the windows. Santana uses these for boom tubes.
Vyatek - ExoGrid Technology
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."