For one thing make absolutely sure you download "whatever files" it takes to define your present "tune" so that if "somebody" screws up you have a backup. And don't save it "there." Save at least two copies in different places, IE on your laptop maybe, and on a card/ USB stick etc
I don't know but it might be a good idea to print out some of the pertinent "stuff" like fuel map settings and timing settings so if the tuner starts doing this or that you have some idea of "where it is going."
I'm certainly no expert on that end of stuff but that is where I'd go
I don't know whether I'd expect so much change in top end performance, but maybe better startup and driveability
If you don't gain "a thing" it will at least confirm the engine was close and "running safe"
