Run Off Groove Supreaux DeuxVerified

From the post

Often imitated by boutique builders, the ROG Supreaux Deux overdrive is an old Supro 16T in pedal form. The Deux is the 2nd go at this circuit and offers several improvements over the original design. It runs off 18v, so I've added an onboard charge pump converting +9v to just under +18v. You can use either a MAX1044 or ICL7660s. Remember to bias the drains of Q1-3 to around 12v.

From the ROG site:

The revisited circuit captures much of the amp's tone. The brilliant treble response is replicated, along with the Tone control range. A sweet overdrive even kicks in at nearly the same point in the Volume pot's rotation! If you are looking for an articulate blues or classic rock sound, this is a good place to start. Many sounds, from Albert King-type tones to a Led Zeppelin sonic blitzkrieg to sparkling clean can be produced with the Supreaux Deux. Be sure to work your guitar's volume knob and your pick attack when playing with this circuit, as it is very sensitive and dynamic.

Edit: The bass switch is a SPST.

Edit 3/4/15: I noticed my original layout wasn't quite right in the charge pump section. I've updated the layout and was actually able to shave a column off it on the right side.