I noticed on the beavis audio website that on the "booster: how it works" page, the schematic shows a value of 430k/43k for R1 and R2 respectively:
http://www.beavisaudio.com/techpages/HIW/hiw1.gif
But on the schematic for the fuzzlab jr., Dano has changed the values to 1M/100K for R1 and R2 (listed as "R3" in the fuzzlab jr. schematic):
http://www.beavisaudio.com/projects/FuzzLabJr/fuzzlabjr_schematic_rev1.gif
What is the benefit of this change? R1 and R2 are still dividing the voltage in the same ratio, but does this yield more/less output? lower noise?
I believe it raises the impedance.