Hi,
I put this together for my cousin as a christmas present but though others might find it useful to.
It's a pdf outlining 3 simple guitar effects circuits.
I've made the muffer so far with my cousin (the other 2 are soon to be started). The muffer gets good results and has some possible tweaks which should be interesting.
I was able to get all the parts from mantech, except for the inductors. The inductors were ordered from farnell (mantech can organise).
Here's the link:
http://www.jayda.co.za/fx.pdf
Hope people find it interesting!