Here is a fairly standard E9/B6 Universal Tuning. It uses 7 Pedals and 5 Knee Levers on an S-12.

                    PEDALS                     KNEE LEVERS
 OPEN
TUNING     1   2   3   4   5   6   7      LKL  LKV  LKR  RKL  RKR
------------------------------------------------------------------
  F#                                                 G

  Eb                                       D                   C#

  G#           A

  E                F#          E                          F    Eb

  B        C#      C#              C#           Bb

  G#           A                   A#                F#

  F#                       F

  E                            D                          F    Eb

  B        C#          C                   D

  G#           A

  E                    Eb  F                              F

  B                    G#  C#
------------------------------------------------------------------

NOTES:

• P6 is tuned while RKR is engaged.
  (That is, Pedal 6 is used with RKR and raises the Eb on string 4 back to E.)
• LKV is extra long so you can use it with all pedals easily.
• LKR is split to allow you to get G on string 6 using P2 in combination.
• LKR is placed away from the player toward the front so there is no obstruction.
• The 6th-type sound is achieved by lowering strings 2, 4, and 8 (RKR).

Legend

LKL = Left Knee Left
LKV = Left Knee Vertical
LKR = Left Knee Right
RKL = Right Knee Left
RKR = Right Knee Right