Duplo Technic Brick

thingiverse

A modified 2x4 duplo technic brickI really wanted to use cfinke's - Customizable LEGO-Compatible Brick generator (https://www.thingiverse.com/thing:615256) to generate some more duplo technic blocks but even after getting the script to work in openscad I found the technic holes it generated did not line up with the aliexpress duplo technic holes.Luckily ortwin has come through with the goods again with a compatible duplo brick design as well as an additional technic hole added on the end, I copied the internal design from cfinke but use the dimensions from ortwin. I also rounded some edges for kid safety and kept the counterbored technic holes to make them compatible with the duplo pins I have recently uploaded (https://www.thingiverse.com/thing:6412091)Images:First image shows the great compatibility with existing aliexpress duplo technic as well as with the printed technic pinsSecond image shows comparison of cfinke and ortwins block dimensions, you can see the cfinke technic holes are too big and too highthird and fourth images show two of the printed 2x4's held together with a printed pin to create a connected 2x8fourth image is just a closeup of a single 2x4 with a printed pin in the end