Comparing to my friends savage drive and some gut shots I found online these are the mods I made:
R4 - 220r (I used a trimmit with a 100r 1/8w resistor in series with a 500r timpot)
R8 - 100r
R9 - 15K
R15- 470r
R19 - 4.7K
C7 - 2.2nF
C10 - 100n on some gut shots 150 on others (I put on a switch as described above)