This is my take on a sustain pedal for an electronic keyboard. The style is a copy of the first Google images results I found and the main focus of my design was on creating the instrument jack connector and having it work - which it does.. This is not a finished piece, as it still needs work with regard to fitting it all within the casing - it needs to be more snug and "stick" without screws and such- this was more for the purpose of testing whether or not it could work, and since I did this by designing and printing one piece at a time as I thought of it you get... well... you get it. 8/14/2013: I have uploaded a better version of the case and updated the .STL and 123D Design files. Also posted pics of this printed -The changes allow the case to be more rigid and limit the movement of the pedal mechanism within it, while the bottom piece does some of the same as well as provide a more snug fit. You can view vids here: http://youtu.be/vKlPqQwN2BY http://youtu.be/PSLVj0xkhhw http://youtu.be/1fwIBxYF2JY Just print and piece together (use support material for the case) - it has a puzzle like quality. I use a spring I got from Ace Hardware that was supposed to be for my reprap, but was the wrong size, and an electric guitar string (.9) for the instrument jack connector. The guitar string forms the circuit and also helps to hold the parts together. I've also included the Autodesk 123D Design file so have at it. I'm hoping the instrument jack part intrigues some and spawns some other interesting ideas for print.