This one looks so simple that I might try it out before doing the Maz Jr conversion. The output section was basically snagged from the Soldano Atomic 16.

R1 220k
R2 1k8
C6 1uF
C1 .02uF
R6 remove
C2 jumper
C3 .002uF
CW1 500k A *
R4 remove
R65 470k
C10 remove
R3 100k
R11 stock 100k but bypass it with 0.001uF cap
R5 1k8 plus 1uF cap
R61 470k
R13 39k
R16 1k8
C13 1uF
R15 330k** [EDIT use 100k (stock) to 150k]
R18 47k
R43 & R44 2k2
R45 & R46 220k (reroute leads per layout drawing)
- add 120pF "snubber" cap between two terminals on C21 and C22 coupling caps that are closest to the top panel controls [EDIT I actually mounted snubber cap between pins 1 & 6 on the V3 tube socket]

* The regular SLO uses a 0.001uF bright cap across the pre gain volume pot but it is removed for the Warren Haynes mod [EDIT I think you really need the bright cap for humbuckers]

** This is value shown on my drawing but please ignore that and use 100k to 150k instead