W4S STP-SE DIY mods

Greetings,

I've got my STP-SE inhouse and researching my upgrade mods. I understand both Underwood and W4S sell mods as a service but I would like to keep costs down and exercise my soldering iron.

Does anyone have specifics on values/locations for updating the volume ladder resistors, diodes, and inductors that would be awesome.  

I believe I have details around the PS caps, voltage regs and opamp chips. 

Anyone have specific recommendations for parts to swap vs leave as is? Any specific pitfalls or gotchas I should be aware of?

Thanks much,