Rick,
Your engine is doing just fine. As it breaks in MORE and MORE, it will need to be slightly leaned out MORE and MORE.
Every DA I've owned has done exactly this. It is especially noticeable when it comes off lawnboy ashless for the first time, and onto Amsoil.
As stated above, adjust the needles in 1/16" increments. 1/8" is a little much when you are already close.
CDignition,
Leaving residue on the bottom of the plane is perfectly normal, ESPECIALLY when they are new. When they are new, they should leave BLACK residue on the plane. This is tiny bits of metal from breaking in.

barryBRCU,
If you can't get your engine to perform and not be lean, then richen her up!
I'm not trying to tell you that you are wrong here, but I guarantee that should not have to be slowly choking a DA100 as you taxi down the runway!
If you have tried messing with the needles, and still have the problem, call DA! They'll fix that thing. Are you letting your engine warm up real good?