title: Blender Cut with a Plane
body: <p>I have created a tube like object that has different radius sizes every 5 cm. 
  I took this tube and put a cube around it. 
  Cut out the form of this tube out of the cube (boolean modifier, difference).</p>
  
  <p>Now I have a cube that has a hole through it with the form of the tube. 
  I would like to position a plane at the center of this cube and cut it in half. 
  Boolean Modifier does not work. Difference only gives me one half of the cube. 
  But I want two pieces. 
  Subdivide the cube faces and select the vertices and separate is great, but leaves the inner structure uncut. </p>
  
  <p>Is there a simple way to cut this in half ? 
  Is there an addon/script that does this ?</p>
  
  <p>I already lost too much time on this and I need to solve it. </p>
  
  <p>thank you for your help !</p>