Hello,

I may be misunderstanding what you are requesting but could you just select one of the end curve profiles, select curve Offset, type in 0.4mm and place your cursor to the inside of the part, then just Extrude the part to the end? That worked for me, however you might be asking something else. I ended up with a part that could be wrapped with 0.4mm of material so it would match the dimensions of the blue model.