The easiest way to check the bias is to connect your DMM's + or red probe to the collector of Q2 and stick the - or black probe in the screw hole of the enclosure (or to ground somewhere on the board or battery). Turn your meter on voltage and you should get a reading close to 4.5V. If the bias is off and you used a trim pot in your build you can adjust the trim pot until you get the right voltage or it sounds good to you.
Do the same thing if you are checking the bias of Q1 collector, but IIRC, the voltage should be about 1.5V.
If you used stock values you should be pretty close already.
Forum member Gus just started a thread on a different way to bias a Fuzz Face. Also, Mac posted his ideas. Check it out!
Otherwise, the most popular way to adjust the bias is the adjust the resistor to the collectors of the transistors. It's done the same way as the Ge threads you saw, but Ground will be negative (if using NPN Si transistors) as opposed to PNP Ge transistor.
Hope this helps.
EDIT: Q1 Collector should be 1.5V!
