OK seems like there are lots of different people doing mods on this classic pedal.
Anybody know which is best?
Analog man
Analog Man - Superior Guitar Effect Pedals!
tube screamer heaven
eBay Store - Tube Screamer Heaven: Componants, Vintage Chorus, Vintage Super Metal
Keely mod
Keeley TS-9 Tube Screamer Baked Mod
also this guy
eBay My World - deadeye-beve
Are there other options?