Ring Mod - http://www.curiousinventor.com/kits/voice_of_saturn_modulator Synth - http://www.curiousinventor.com/kits/voice_of_saturn Sequencer - http://www.curiousinventor.com/kits/voice_of_saturn_sequencer they look pretty cool to me. too bad i don't know **** about building pedals because i would love to build one. hey... you can buy em assembled too! but i rather build one. i'm guessing you could install a footswitch fairly easy and install some exp. jacks. sirhc.