Looking at a deleted x15

[Rawze]

people with bad delete programming usually always swear 'it seems to run good'... until its far too late that is.

more than 90%+ of all delete programs area absolutely harmful and damaging to the engine internally over time.

2+ years on an unknown de-mandate, expect that the engine has been heavily abused and in need of an inframe or on the cusp of some other catastrophic damage that has likely already set in.

unless someone was willing to copy the program out of it via CT and send it to me for a review to ensure that the de-mandate program is not extremely harmful, .. then I would not give anything more than scrap price for it.

... and just like you mentioned.. if the mechanical stuffs was not done just right too.. then things could be even worse.