Deftronix - 1) Yes, I drilled the three relief holes just as described by ZetaTre. 2) Not a big deal, but the price for the hose is a bit more than you think. The website is somewhat confusing/misleading, but the actual price is $35 per "0.2 Qty = 1 meter." So you'll need 2 meters = $70.00. With shipping/handling I think it was right around $80 total.

Otherwise I'll merely repeat that the system seems to be working great. No issues at all. I was doing some preventative maintenance a few weeks ago, and there was none of the sticky, tar-like CBU I had in the past on the EGR valve, and no liquid oil in front of the throttle/anti-shudder valve. Consequently, I assume the intake manifold, valves, and swirl flaps are similarly in good shape.

Good Luck!

__________________
Stephen
2010 e70 35d- now driven by son #2
2005 e53 3.0 - now driven by son #1
2021 G05 45e PHEV - now driven by me
2008 ML320 CDI - driven by wife