Haha I don't think I could bring myself to sell a literal alumin can that I hacked with a dremel, so consider it payed forward! But it makes you wonder about how much of a killing you could make on custom tools!

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1999 E300D OM606, 278,000 km (Daily)
1984 Camry Turbo-D, 319,000 mi (Sold)
1992 300D OM602, ~450,000 mi (Sold, Blown Head)
1999 F250 7.3 Powerstroke, 243,000 mi (Sold)
1996 VW Passat TDI 110,000 mi (Sold) "The first Diesel"