noob problem

 From:  pete (PJL350)
5148.1 
Hi,
I'm trying to make this sweep along the path but I cant seem to have any success, even if I try to trim off the bad bits after the sweep something always goes wrong.
I know the curves is a strange shape, but I need the sweep to subtract from some other surfaces to try to do a blend.
I have only a few weeks experience so I must be doing something stupid. I have try in 2.0 and 3.0 beta.
Can anyone give me any advice?
Thanks,
Pete


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