I've been building my way through OD's the last year or so myself, and 3 that stand out for me are:
Way Huge Red Llama:https://tagboardeffects.blogspot.com/2012/06/way-huge-red-llama.html(easy build, and it sound great with everything I throw at it)
Ramble FX Marvel Drive:https://tagboardeffects.blogspot.com/2014/07/ramble-fx-marvel-drive.html(this one is a bit more involved since it uses JFET's, so you gotta roll your own SMD J201's if you want it to work right)
and my favorite so far...
Rockett 45 Caliber:you can find the vero and discussion here:
Contributions › Verified Layouts › Booster, OD, Fuzz, Distortion
Refresh(build it, and you'll know what i'm sayin'! it's a great sounding beast!)
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