This is a case for the Pocket Operator series of synthesizers made by Teenage Engineering. Its main features are:

• Keys move freely
• LEDs are still visible
• Audio sockets accessible with standard sized rubberized jacks
• Possible to keep the break-away hanger if wanted
• Possible to keep the wire-stand attached
• No glue or screws
• Printable with low-end FDM printer

Source files are created with FreeCAD 0.15.

Note: A version of case, buttons and light guides optimized for SLS/SLA printing also available at shapeways: https://www.shapeways.com/shops/cdb

Compatible with these things:

• PO-20 symbol buttons: http://www.thingiverse.com/thing:1410100
• Numbered buttons: http://www.thingiverse.com/thing:1617681
• Light guides (difficult!): http://www.thingiverse.com/thing:2091660
• Mic Frontplate: https://www.thingiverse.com/thing:2779257
• Experimental eurorack frontplate: https://www.thingiverse.com/thing:3039287
• Button Customizer: https://www.thingiverse.com/thing:3668411

Compatible remixes and things by other people:

• Light guide buttons by Axeman72: https://www.thingiverse.com/thing:2090105
• Mini lever by RJ_12: https://www.thingiverse.com/thing:1489435
• PO-28 symbols by KingWarin: https://www.thingiverse.com/thing:3441682

Update (Jan. 30th 2018) Added microphone holes to the front plate (Case_Front_full_v6_mic_rotated.stl) for the new PO series (PO-32, 33, 35).

Update Feb. 2018 Big thanks to the guy who sent a tip for the case. This is a first for me, feeling very humbled!

Update (Aug. 8th 2018) Added experimental eurorack frontplate. (Thing 3039287)

Update (June 2nd 2019) Added Button Customizer (Thing 3668411)