I'd like to loft between two pairs of concentric circles to make a pipe whose wall thickness is the difference in radii of each pair. The loft tutorials I've seen all produce solids or surfaces, nothing hollow with a wall of finite thickness. Is there a way to do this? I've tried in my own design but always get a solid. I'd include a screencap, but my drawing is sufficiently complex I've found it hard to display what I'm trying to do. I'll try to divide it up into more sketches so I can turn visibility off for some things, if necessary, but thought I'd check here first to see if there's a simple solution. Thanks.
