To make a gun strap,what I would do is.....the simplified version to get you started. 1.Oped a cube primitive and reduce one of the sides to flatten it. 2. In the vox menu ,drag the object into the spline folder ( i think you grab it via the little divide symbol to the left of the plus sign.) 3 A window should open up with some sliders in it ,there you can adjust your spline. When you ok it, this spline is then in your folder. 4 Make some curves then you can select the spline