This is a mini sustain pedal for my APC Key25 which has only an ugly positioned button. I installed a 3.5mm Jack into the APC and wired it parallel to the Sustain button. The pedal itself is laser cut, it uses two 1cm diameter springs and a button I found in somewhere in the electronic lab.
<gallery caption="Fotos 14.10.2015Pictures of the mini sustain pedal">
Datei:SusPed1.jpg|The pedal itself
Datei:SusPedSide.jpg|The pedal from the side
== Files for laser cutting ==
[[DateiMediai:BoxPedal.svg|nkscape file for cutting from 4mm plywood]]