I think you'll find that on occasions ''Lufthansa Technik'' service their own, and QANTAS engines.
Also, other operators have their engines de-rated from the maximum available from R-R. QANTAS do not, and I quote, ''upcharge via chip and augment to thrust'', or ''The Qantas engine is modded to make more power than the SIA one.'' The engines are bought at the thrust rating required from the manufacturer, not tuned at a later date like some boy racer's hot hatch.
I thought this forum was for professionals, not 'best guessers'.
