This is the #ziptiecity model I created for my Youtube video about designing zipties into your designs.  All channels are 3.5mm x 1.5mm which may be too small for some zip-tie styles. Either way, this model can be used to test whether you can print ziptie channels in all orientations with a specific filament and set of printing parameters (for instance, I had PETG stringing which made most of the channels unusable, but my ASA/ABS prints came out great)