the mod where you change the resistors & caps on the output stage IS noticeable, but it's also only two resistors and one cap - please don't pay alot of money for one.
I've said it a million times - there is nothing special about the various Tube Screamer variats to warrant spending alot of money.
Get the basic Ibanez/Maxon TS-5/TS-9/TS-10/TS-808 and have someone mod it.
What exactly don't you like about your stock TS pedal?
:twisted: