Those I looked at use the commonly used TC3_script7.gs script. This is not a library script so any script changes will have to be made to each and every loco that uses it. That includes a couple of mine. I suspect that lots of BR locos on the DLS use that code.
I'll have a look at one or two over the weekend and if I can spot something in the script that I think may be a TRS19 issue then I'll report it to N3V as a possible bug.
Some have been renamed? and contain slight differences in the headcode section, possibly customised for particular locomotives, not that it means much to me as I'm not a script expert, last coding I did was Delphi and a form of C Script last Century.