You don't have to use SpaceClaim. You can have three different layers of bamboo in DesignModeler, and use Shared Topology, like you have in SpaceClaim, but there is a different method to achieve that.  In DM, when you have 3 Parts and 3 Bodies listed in the Outline, you select the three Bodies, right click and select Form New Part.  Then you will have 1 Part and 3 Bodies, and that is Shared Topology.