Temperature Tower with Slic3r G-code generator

This is a customizable temperature tower in OpenSCAD that also generates the G-code for temperature changes in Slic3r.
To generate your own tower, open the scad file in OpenSCAD, set the temperature range and step (can go up or down), adjust model sizes to your liking, and export STL. OpenSCAD will print the G-code in its transcript. Clean up the ECHO and "quotes" so it looks like this:

{if layer_z >= 1.5 && layer_z < 2.5}M104 S220{endif}
{if layer_z >= 7.9 && layer_z < 8.9}M104 S215{endif