Take the PLA Cooling Challenge!

Here is a challenge that will put your 3D slicer and printer to the test and can improve the quality of your PLA prints.

1. Print the **pla_cooler_test1.stl** model using PLA and **no support material**. Optimize the setting of your slic3r and printer to get the best quality you can (e.g. how clean is that inner surface of the ball?)

2. Print the **pla_cooler_test2.stl** model using the **exact same settings**. This model is identical to pla_cooler_test1.stl except that it has additional t