Stock CR return lines

[Boostediesel]

i saw the thread about drilling out the banjo bolt that goes on the return line on the back of the cylinder and was wondering at what point or power level do the stock CR return lines become a hindrance? since i am deleting my fuel canister and gonna be running the 6.7 aftermarket intake plate, intake horn, 6.7 fuel rail and lines i need to do a custom setup for the return lines and was gonna go to braided lines. just would like to hear what other have done.