Summary Will be set of ThinkFun Expansion. Thing: Extender01.stl Designed to join two connectors to extend. Thing: ThinkFunStrawInsert.scad My first trial with OpenSCAD. It was a bit difficult for me to print rods, so I decided to use straws as rods. The one I bought from IKEA (Sommarfint) was slightly bigger to use, so I decided to design a simple insert. Second idea is to make it customizable according to straw diameters that you have and insert lengths that you require. Print Settings Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.2 mm Infill: 20 Notes: (Cura, Metal Simple, PLA) Extender01.stl 13 minutes to print. ThinkFunStrawInsert.scad (Print with raft) 19 minutes to print Post-Printing Extender Extender ThinkFunStrawInsert printing with raft ThinkFunStrawInsert (straw insrted, become rod) ThinkFunStrawInsert