Raspberry Pi stackable tray - Parameteric power supply holder

Parametric power supply holder for [Parameteric Raspberry Pi Stackable Tray](https://www.thingiverse.com/thing:2909296). The default values in this thing are for the "Anker PowerPort 6" 6-Port 60W USB Charger.

You may also have a look at the [Raspberry PI stack mount for ANKER PowerPort 5 USB charger](https://www.thingiverse.com/thing:2758155) from [mihies](https://www.thingiverse.com/mihies/about) which is for the Anker Powerport 40W with 5 Ports.