NovaPro V4 - Flex Shaft Driven Dual Feed Gear Extruder

Presenting the Nova Pro V4 Flex drive edition precision flexible shaft drive extruder! This project combines a flexible drive shaft locating the motor up on the frame, rather than on the moving carriage, with a bondtech drive gear set. The result is an extruder that while slightly larger than the Flex3drive or the Zesty nimble, has about twice the theoretical filament push force for around the same mass. It's also open source. I've included step files for most of the major components along with