peavey_xxl on the forum posted a link to a schematic that he said someone who built a clone referred him to and so here's the layout based on that scheme. I have done the layout with the same mojo paper in oil caps in mind that were used in the original.
Updates 30th Jan 2013 - Pot value established and corrected, thanks peavey_xxl
Info about the original:
EM-Drive Transparent Overdrive:
Handwired, Handbuilt in Broken Arrow, Oklahoma USA using some of the finest quality & reliable parts available. This pedal does everything from a slight boost/sparkle to a nice, warm light OD sound. Good for use as a first stage OD or a nice boost pedal.... you may find yourself leaving this on the entire gig!
-NOS PIO (New Old Stock Paper In Oil) capacitors
-Quality High Tolerance CTS Pots (Hand Metered & Matched)
-Durable Turquoise powdercoated finish
-USA Switchcraft jacks
-3PDT True Bypass Footswitch
-Hand picked and matched parts for tone and durability
-Power: Standard 9 volt DC power supply with a negative center 2.1mm barrel, NO internal battery option.
and a compact version for those without mojo tastes :o)