Built this case for my KO! out of LEGO. : r/pocketoperators
5 Tips & Tricks for the Teenage Engineering OP-1 - from UK distributor Sound Technology Ltd
Teenage Engineering made a robotic LFO out of LEGO - and now offers barebones modules - CDM Create Digital Music
OP-1 accessory demo - YouTube
Amazon.com: teenage engineering OP-1 Portable Synthesizer, Sampler, and Controller with Built-In FM Radio and 4-Track Tape Recorder - 10 Year Anniversary : Musical Instruments
Wintergatan Marble Machine - live on Teenage Engineering OP-1 - YouTube
Teenage Engineering OP-Z or Modular LEGO knobs & stand / Accessories | Reverb