Good links, thank you. I guess I need to buy an e90 so I can join that forum. (The wife may buy that ��). I’m gonna have to just jump in and do it. I’m planning to pull the line and take them to the hydraulic shop to have them “reproduced”. Trying to figure out ways to eliminate potential problems down the road. The back story is that my mk4 vw Gti had a problematic turbo coolant line (APR 3+ turbo) and I fought with it for years. I went through several types that were all stainless braided and I finally solve the problem by making the whole bottom half of the line out of stainless tube. Had it bent and silver soldered (brazed) the banjo fitting on. No more worries.
That said, this Isn’t the same kind of car as a modded, big (for the application) turbo, double the factory hp is, so I’m not going crazy to “mod” anything. This is my daily and I love it the way it is. Think OEM +. Just upgraded for reliability and stoutness. If I make these lines right, I may be able to put a disconnect between the hard line and the “flex section “ so the only thing that will fail will be accessible without pulling the large turbo again. It does create additional connections (read; failure points), so I’m still undecided.
Any additional comments are appreciated as that will help me refine the plan.

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- Tom
‘10 E70 diesel, hud, hot/cold weather, 3rd row.