Mmm my thinking too, good advice......i too think you may struggle keeping the engine together for long at much over 7k, i was told by a very reputable cvh tuner there are a 'few' flaws you will come across if you rev over 7k for any length of time
I too was going to rev mine beyond 7k as the engine was still making good power but capped it at 7k in the end after that advice, engine sounded was a screamer anyway so dread to think what it would have been like at 7.8k lol!!