Attached to this post you'll find what is to all intents and purposes a simple part I'm trying to sweep a small rectangular section around a 3D path.

I'm having one or two issues with the spline - it won't play ball sitting on the face.  I rarely if ever do 3D sketches, so rather than bang on for the rest of the day trying to work out what's wrong, I thought I'd give you  3D sketching gurus a laugh at my expense instead

If anyone can take a look at the part and tell me where I'm failing miserably, that would be great. Ultimately the sweep will be mirrored around the other side of the part.

Cheers

Jason