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Ecobeard
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I dont think they'll hand out any drawings, but there is no harm in asking. Tube doesn't seem to be a true aerofoil, which is annoying as we could maybe have found a matching ID to OD steel or alloy aerofoil. Copying the profile of the mast is probably going to be the way to go about it using CAD (cardboard aided design) and then throwing that at fusion, but then machining something like a topper is going to be spendy for one off. So the other option is to make it out of sheet, but using a binder on a carbon foil is quite hard to do without uneven loading.
Ideally we can get a group buy going for 10 off and it becomes much more reasonable to machine.
3?