Safety Valve-B-Gone

I'm not understanding your Question.
Which route did you try it on, I tried it on "TSW4 WSR-Peak Forrest-Set C: Minehead - Norton Fitzwarren- with the LMS Jubilee"

I just tested again between Liverpool Lime Street and WSR-Peak Forrest- Set C: Minehead - Norton Fitzwarren- with the LMS Jubilee. There is zero difference when in the cab or out of the cab. it sounds the same.
There is a difference between being in the cab and out of the cab With the Jubilee when doing Liverpool Lime Street timetable scenarios.

I just realized it was for the wrong mod. My bad. I was confusing it with the safety valve eradicator. So sorry about that. I thought this was the same mod because I just read safety valve b gone, but I hadn't read the description correctly

that is okay, it happens, no biggie :) can't tell ya how many times I had to correct myself, we are only human. But yes I did try that other mod also.