DIY Coffee Grinder - A Mechanical Design Project

Around a year ago I embarked on a design project to teach myself some mechanical design and machining skills. Based around a stainless steel conical burr set and a 12V windshield wiper motor, I designed and built this coffee grinder (pretty much) from scratch.
I'm making this video as an easy way to share my learning journey and hopefully inspire others to start their own.
00:00 Intro
01:06 Features
01:38 Burr Set and Motor
02:44 Key Concepts
04:28 Outer Burr Assembly
06:42 Inner Burr Assembly
08:23 Frame Assembly
09:12 Drivetrain Assembly
10:27 Fast Forward Assembly
11:20 Design Lessons