Posting a video of your blowby on YouTube might help people make a judgment on it. A number of people don't like the shut down test because it puts pressure on all the seals in the engine and if a seal is leaking it's not giving any reliable information at all on blowby. There was a thread started a year or so ago where people where attaching a standard plastic garbage bag to the breather tube and seeing how long it took to fill it. There is a proper measuring device for determining blowby but I've never heard of anyone on this forum using one.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13