Thanks - This link works but the detail in the add isn’t claer whether a component is aluminum, carbon or some weird combination of the two materials.
At one point they say All carbon is $X or All aluminum is also $X which is a clue as manufacturing costs would logically be different.
If you compare the $ in the add to say the Gong products often used here it’s a clue to what All carbon retails for.
@SanguineDrone That doesn’t mean that your mast is bad but certainly harder to determine what it’s made from or if there are usable voids inside.
This is a post here where it looked like they used a really long drill bit to make channels in their mast. Also search “carbon mast” here for other ideas.