Heddle Workshop for Blender

Create your own Heddle STLs! Choose your desired dent, the length of your hole, and how long you want the STL to be* so that it fits on your 3D printer bed, all within the Geometry Node modifier panel. Once you apply the geometry node, you can export the model as a completely manifold STL!

*The Width in Inches slider allows you to specify how long your model should be, and then it fills that space with heddle bars specific to the dent you've asked for. This means that your heddle model will not be exactly the size you've specified, just the closest number of holes and slots that can fit inside your desired width.