Anyone using the JoyRider DIY motion platform?

[hardlock]

I'm not seeing any mention of this inexpensive DIY  motion platform on this forum?

 

The concept is simple and passive (no motors, drivers, etc.) but effective, fast and easy to build. 

 

The complete concept is documented here: JoyRider Introduction

 

How-to chapters start here: Chapter 1

 

In depth PDF Plans are still available here: PDF Plans 

 

The company is considering closing soon so if you're mechanically inclined you might want to check them out!