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The Catwalk LPG/VCA is Waveform's DIY Project #5. These are utilities that attach to your Eurorack system in a completely new way, taking up no HP. By switching out one component this can be either a Low Pass Gate or Voltage Controlled Amplifier (actually, since it's passive, it's an attenuator NOT an amplifier), and the faceplate is reversable to show if it's a VCA or LPG. These are pretty easy to build, though it does take some maneuvering to get the parts to fit right. The instructions on how to build this are detailed in issue #5 and can also be found on the Build Guide page. Faceplate is black with silver.
Comes with M3 screws and standoffs