Equidistant curve

 From:  Ditto
4343.1 
I don't get it. Another newbie issue, for sure.

I have created 2 straight curves. Offset them vertically and horizontally, then blended with a G1 and joined them. This is what the attached file has.

But the hell, I can't get an equidistant curve of it. I thought that offset would do it, but it just won't work.

My ultimate goal is to have a solid of that shape, and, by creating equidistant lines, to boolean it out off a cube.

Any idea ?

Thanks,
Ditto
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