Hi guys

I'm trying to project a spline of a cutter onto a plane object that I can then manipulate into the box that I want. When I project the the paths it all works ok but then I can't seem to separate the areas I want to keep so I can them make up the box shape itself. I'm sure there is something really simple here I'm not doing right. I have also have tried rebuilding the paths from what come in when imported as 140 curves (even after compositing in Illustrator) but when I run the rebuild function it will only get it down to around 20 objects. I can't seem to join it either.

I could just build something like this from a cube but I would like to know if I can make up what I need from a cutter guide too.

Many thanks guys

Lang