I just pulled the injectors off the 300SDL - cleaned them all off with wire brush and plan on installing new shields. Was going to get them tested by a local diesel shop... there is a guy that lives close to me that has a diesel performance shop - is there something specific I should ask him other than to test the pop pressure and spray pattern on all 6.

The injectors markings are as follows:
BOSCH GERMANY 651
060 KCA 30 S 44 435bar (Edit: it's 135 bar)

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K