Not done any of his kits but can wholeheartedly recommend
BYOC kits. Super easy to follow and you'll end up with a good pedal at the end of it. They're marketed by
vibe-o-tronic over here (always a fun one to explain on your visa bill).
As mentioned earlier,
Madbean's boards are excellent as are his instructions, but it's a bit of a step up from BYOC. Doing a BYOC kit first will get you into some good practices for assembly. For these you'll have to source all the parts for yourself and drill the enclosures, etc. There's a bit less hand holding. Other sources for PCB's would be:
GuitarPCB,
MusicPCB,
GGG (also do kits),
Das Musikding (also do parts) and
Tonepad. These are some of the parts suppliers we use if you go down this route:
Farnell,
Rapid,
Bitsbox,
Tayda,
GapCo,
MEK,
Das Musikding &
Smallbear.
If you're handy with an soldering iron and ambitious, you could buy some vero board and do it all from scratch. Bob over to
Sabrotone,
IVIark's or
Aron's for more vero layout's than you'll ever be able to make in a lifetime.
For help, BYOC and Madbean's forums are excellent, friendly places. A bit more advanced would be places like
DIYSB & particularly
Circuit Workshop. Controversial and sometimes not quite as friendly (downright abrasive/vindictive/nasty to some commercial builders. Sometimes justified, often not) is
FSB. Put it this way, I rarely go on FSB these days, usually only when I'm trying to find something specific. Shame as it's a great resource.