So I've modeled my own scaffolding as skeinforge doesn't seem to do it effectively. You can see it in the attached picture (upside down).

My question is how thin should I make the walls so that skeinforge doesn't try to fill them in but treat each wall as just a single pass on each layer?

If you are using Original SF: Layer Height x Edgewidth over Height
If using SFACT: Edge width
If it is not extruded make it 25%wider..

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[github.com]

hi! did your manually create scaffolding / support work?
can you post the specs so that i dont have to experiment on settings and size.