A company based in the US puts together kits complete with instructions for doing just that!! They are all based on some of the most famous circuits around for each pedal. I recently bought a Trem pedal from them and assembled it!! Sounds ace and was a right laugh doing it covering my mum and dads table in components and bits for the evening. Plus its also pretty cool knowing you've built your own pedal! Any road heres some links for you to check out if you're interested!!
This is the main company based in the US
http://buildyourownclone.com/index.htmlThis is the UK distributor
http://vibe-o-tronic.co.uk/And here's what I could have done, had I been bothered...
http://worshipguitarist.files.wordpress ... cefuzz.jpginstead I'm thinking of just writing on "0" and "11" for each knob...
Enjoy!