tbo - Today I was just testing to see if the ALDA was the issue before messing with it. I'd like to get it working properly, see how the power is, then consider adjusting.
vstech - actually a 24 mm right under the base of the ALDA, doh!

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1986 300 SDL, gray on black, #14 head, 180K miles
1982 300 CD, silver on palomino, 290K+ miles [sold]
1980 300 SD, white on palomino, 500K+ miles when retired [uncle's car - inspiration for the above]