Is there a way to edit the values found in StraightSegmentCalculationServers file? Specifically the one with flush tanks.

My goal here is to add 4 lines of code for fixtures. It defaults to 15 GPM for <5 fixtures. So 1 fixture is 15 GPM and that is leading to some issues. Any ideas and explanations are appreciated.

I can see the code that I want to edit. Sorry if this is a completely beginner question I am new to the inner workings of Revit and while impressive are proving frustrating.

Thanks for the help.

Attempted: Creating a new addin and loading it into Revit
Result: Revit crashes and says no longer responding.