It seems that most clones available elsewhere at the moment are based on a more readily-available schematic. A lot of players (and apparently builders as well) don't know that there were a few circuit revisions while the original unit was in production - one was smoother and warmer, one was too bright and really harsh - which means it's a toss-up for people who are paying $250+ for the original pedal when some are better than others. This is a clone of the warmer and smoother of the two revisions - the one that should be cloned.
Demo by The Tone Unknown (EN)
Demo by So I Found This Pedal (EN)