Nice list, and I dont see nothing wrong with the header wrap, hell throw a heat shield on top of that! I have header wrap on my Dp...
As far as your 7bolt blowing, what was the reason you got rod knock?

A few things that may help you keep an engine-

*wideband
*logger ( I saw you had those.)
*running correct fluids
*conservative tunes/ knock free
*knock buzzer or light that goes off at a preset amount of knock so you can let off the gas the second you hear/or see it..

( I happen to have a knock buzzer hooked up by a friend, its hooked up to the purge solenoid goes off whenever my ecu trips 10counts of knock. Audiable enough to hear at WOT. I dont ever trip it though which is a good thing. I mean, who has time to check their logger or laptop all the time, IF its even hooked up at the momment you had knock.)

But also, says you have a chip tune. Its only compensating for injectors?
Nothing else? No 2step, no lift to shift, air fuel ratio/ timing adjustments?
You could also have your chip set up to turn your cel on after certain amount of knock!

I dont think your going to blow your motor by the way, Just some tips from me to you !