This gonna sound dumb but… how do I dubilcate a curve inside a geometry so I can fuse them, and revolve them to make a vase?

How do you continue a curve? from start or end?

Hi,

For curves, it is JOIN rather than FUSE that should be used.

Maybe this:
http://www.aiworks.eu/modeling/49-h11cb-modeling-close-mirrored-curve.html [aiworks.eu]
or this:
http://www.aiworks.eu/modeling/15-h10cb-modeling-create-a-red-blood-cell.html [aiworks.eu] will help.

Cheers,
Greg