2020 mountable Keyboard Tray for Rii Ultra Slim Wireless Keyboard (or similar). Long and Short versions

This is a simple keyboard tray that mounts to a 2020 extrusion. It was designed specifically to hold this Rii K12 Ultra Slim Wireless Keyboard/touchpad: https://www.amazon.com/gp/product/B00ESUXXZM/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=joemike-20&linkId=35d6ee68efd617e5f3fe008b928513f5

It can of course hold other keyboards or items.

I use this in conjunction with my 7 inch Raspberry Pi Touch screen and Pi 2 to run Octoprint. It provides a nice little kiosk on the printer itself.