I reckon it will be fine, not like your running heaps of power, So all though its revving hard theres not the strain that say 300kw would put on the enigne..
I wouldn't worry too much, just drive it and remember to shift before 7500 and it'll be fine.
Id say your tuner knew there was more power up top so gave you the ability to use it..
Sounds like you've built a nice revvy motor that will have very snappy acceleration, be great out of corners...