Welcome back!
Sorry to hear that you have left the fold, but at least your replacement carries some family lineage still.
That 2.5 TDI engine is a relative of the old D24.
We have talked from time to time in the past about opening up a section on the forum for discussion of the 2.5 TDI, given its similarities to the D24 family. Continue stopping by, maybe we'll do that someday and it will be of use!