Hello,
I was searching for some bender tone thread but nothing seemed to satisfy so I got to work,....(thereby burning my fingers..)
After some research,..
I did some tone mods on the bender fuzz:
The tone regulation exists of two parallel hi-pass filters linked by P2,
R9 and C7 together have a lower cut-off frequency than C6 and R10.
Turning p2 towards R9 and C7 gets you more low frequencies, by turning towards R10 and C6 less. The tone knob (P2) regulates the quantity of low frequencies, all higher frequencies pass.
I tempered some of the highest frequencies by installing a simple low-pass filter by linking a 22nF cap with an spdt switch between the output (middle contact) of P2 and Gnd. This goes better with my fender princeton65, this amp has lots (read: too much) treble (read: trouble ), Hints on solving this are welcome!
I also adapted the range of P2. For more bass (you get more bass by reducing the lowest cutoff-frequency, i.e. raise the value of C7 ) and bass regulation, raise C6 and C7 , for more treble regulation, reduce C7 and C6 in value.
Obviously I Raised the value of C6 and C7.
A last thing I did was replacing R6 (10k) with a 20k or 25k pot to adjust bias, for milder germanium fuzzy overdrive use a log pot and turn it down,....:)!!!
The bad thing is you lose volume, this can be adjusted by the volumeswitch orrr,.. If you really like the milder sound you can set the log pot to a desired point and raise the volumeknob-territory to a higher level by lowering the value of R8. I replaced it with 10k for starters.
Did someone experiment with the Hfe values of T1,2 and 3?. How does the Hfe values effect the tone? ( mine; t1:82, t2:72,t3:250 ).
I really like the bite of this pedal but sometimes I mis some smoothness, some "hair".
What are the "best" type of caps?
All comments and other mods are welcome, I 'm learning every day 
