Raspberry Pi3A+ mount for Prusa MK3S+ with CSI camera port support

Inspired by xiphmont's implementation, I created my own files for the enclosure and pi3a+ frame for this update.  Please follow xiphmont's  guide to install the pi3a+ and perform the upgrade.  The installation was flawless for me with the included octoprint image.  Xiphmont's original cover file is included for completeness.

I had some issues printing the pi3a+ spacer frame and had to simplify it.  The many holes for the keepouts on the Einsy board had a problem sticking to the textured sheet.  I also optimized wall thicknesses and features to work well with the Prusa printer part settings. 

The pi3a+ frame and Einsy housing has routing support for a 16mm wide FFC cable to connect a pi camera to the on-board connector.  The frame also has a bit of clearance for the hex key to access the top mounting screw.

I have this upgrade implemented on two MK3S+ printers and the pi's with connected camera run without any issues.  A world of difference from the ZeroW.

An installation point of note:

Slightly bend the FFC cable after plugging into the pi, away from the HDMI connector, about 20° and no more.  You will crack traces if you bend it at 90°.  The slight bend will help it to naturally seat in the right direction during install.  There's a ramp in the frame that will also guide it but it needs a bit of help.

Design Screenshots: