Cutcopypaste is on the right track. Instead of using 3 objects together like that, I used a single one, duplicated it two times (for a total of three), then rotated each one to fit the spiral. Use the circular tool in the spline modeler to make a cylinder. Then go to Geometry - Extrusion Preset - Spiral and enter the following settings: Number of turns : 3 Length : 20 Distance to axis : 1 That should get you close - you might have to tweak the settings a bit. Go back to the Assembly room and duplicate it then set the pitch to 90 for the duplicate. Duplicate the duplicate. That should do it.