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I want to thank everyone who contributed to this thread.
I did my CBU cleaning last week using the tips and tricks everyone provided. It cost me $200 and took 4 nights working 3 or 4 hours each night. I have two more cars to do early next year (335i & 535i) and each one will only cost $25.
$70 Bought the BMW vacuum attachment for the tangential port
$0 Made a vacuum attachment for the swirl ports using an old vacuum tube
$8 Used the wands from the $4 Harbor Freight Blow Guns
$65 Bought the Harbor Freight 20 gallon media blaster
$50 Two boxes of fine walnut shells
$15 1 gallon of Home Depot Degreaser
I will post pictures later this week.
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