This easy Ender 3 upgrade project gives your printer all the truly useful features it needs. All files have been released in the spirit of open source; free for you to download. But you will still need to buy some stuff. Total costs for all the upgrades is only around $20! Meaning you should be able to get a printer as functional as ones that cost 4X as much.

This is the Printer that Prusa doesn't want you to know about. Seriously:    • Video  

So many links:
3D Printscape THANK YOU for the great firmware build:    • Marlin Firmware Build for Design Prot...  
Firmware .bin file for installing on your printer: https://drive.google.com/file/d/1EDE8...
All of my .stl Geometry: https://thangs.com/design.prototype.test
Nozzle Wiper Upgrade:    • Custom Nozzle Wiper for Ender3 & CR10...  
Ultra Low Cost Filament Dryer:    • The Filament Dryer Built Into Every 3...  
The Bestest Filament Spool Hub:    • The Quest For 3DP Filament Spool Hold...  
CNC Kitchen's Concrete Printer Base:    • Seriously the BEST $2 3D printer upgr...  
Board + PSU combined Cooling tower:    • Fixing The Fan Noise on a Stock and a...  
Printable G-code files for Patreon Supporters:   / designprototypetest  

Make sure you check out this video by MihaiDesigns:    • What I've learned about dual gear ext...   I used his idea for a test print to diagnose pulsations in my direct drive extruder. I certainly am not suffering the same problem as he is because his extruder has a dual meshed extruder whereas this is a single hob gear extruder I have. My pulsations are likely caused by an issue Mihai didn't talk about which relates to the effective diameter of the extruder changing. I explain that issue here:    • Is The Bondtech LGX really The Best E...  

TOC:
0:00 Introduction
0:48 What You Need To Get For The Build
5:16 3D Printed Components
6:54 Making The Wiring Harness
10:57 Assembly - Key Details
15:58 Firmware
17:33 Bed Probe Calibration
25:16 Putting This Printer into Context
39:48 Further Upgrades Discussion
49:55 The Streak remains unbroken. "I've never, not been let down by Chinese electronics in 3D printers."