Hi ClosedCircuit, I'll take a look at your files later tonight, but right now a quick answer to this question:

> Finally, is there a direction built into curves (e.g. so that sweep knows where to begin and end)?
> If so, how can make sure that my curves are all pointing in the correct direction?

Sweep will start at the end closest to where you clicked on. So to make sure your sweep goes in the direction you want, make sure when you select it that you click somewhere nearby the particular end you want.

Most things in MoI work like that where if a curve direction is important it's determined by which end you clicked closest to.

- Michael