PowerFlower Geared Extruder

**10 MAR 2020**
The design has been updated with the following changes:
- Support flexible filaments whilst being easier to print.
- Replaced dual tensioner springs with a single M3 bolt for easier adjustment.
- Remixed with the [PowerFlower Belted Extruder](https://www.thingiverse.com/thing:4214316)

**04 FEB 2019**
The PowerFlower is now parametric and available on Fusion 360.
You can preview the design at https://a360.co/3NGqrqG and download it from Thing Files (it's an F3D archive of the assembly). You're welcome!

The herringbone gears were generated via [Parametric Herringbone Gears](https://www.thingiverse.com/thing:818003).


**Introduction**
The PowerFlower is a geared Bowden extruder with a 4:1 gear ratio, designed for 1.75mm filament and an 8mm Hobbed Shaft. In the makefile I have generated and included the main and rear bodies for shafts with common effective diameters (the diameter of the hobbed section). Measure and either print the correct parts or change t