Parts to fit a 150mm x 105mm x 55mm project box with a Raspberry Pi and Suptronics X400 DAC/Amp inside.
These parts are to fit a 150mmx105mmx55mm aluminium project box (such as here
http://www.aliexpress.com/item/Aluminum-Box-Enclosure-Case-desktop-DIY-55mm-2-16-H-X105mm-4-14-W-X150mm-5/32342220019.html) with a Raspberry Pi with Suptronics X400 DAC/amp module (http://www.suptronics.com/xseries/x400.html)
The 'bottom' prints a plate that engages the grooves of the project box and provides mount points for the Raspberry Pi.
The 'front' replaces the aluminium plate at the front of the project box and has holes for the X400 volume pot (centre) and the left and right line-out connectors (left side). On the right side, at the same spacing, are two 6.5mm holes for panel mount switches that can be used to connect to the X400 jumpers for the headphone amp and mute function. Below the volume pot is a 6mm hole to allow a panel mount 3.5mm stereo socket to be fitted to connect to the X400 headphone out. Note; this mount is between the Pi and X400 boards and the cable from the socket to the X400 headphone jack runs between both boards.
The 'back' replaces the rear aluminium plate and has 6.5 mm holes at far left and far right for a pair of panel mount switches - one for the X400 speaker amp jumper and another to provide a switch for the power. There is an 8mm hole (2nd from right, top) for a DC power jack and four 7mm holes (centre) for speaker terminal posts. There is a hole for a panel mount USB 2.0 A socket and mounting screws. I use thumb screws on the back to provide some protection against accidental bumping of the toggle switches. If using the screws provided with the case, use the 'back-countersunk' file.
I've printed the bottom and back in PLA and the front in translucent PETG. The translucent front allows the LEDs on the Raspberry Pi to be seen to show power and network activity.
Previously, when the front plate was aluminium, I have used a 1mm hole on the centre line and 12mm below the centre of the headphone hole to allow the Pi's LEDs to be observed. This does not line up with the LEDs, but the polished side of the hole reflected the LED light and symmetry was maintained.