Thanks for the pics!
Interesting style of piston,has a much deaper valve pocket than stock for that higher compression!...most of the newer piston designs Iv seen dont make contact under the wrist pin,what year is your engine?

Brabus use a different style oil control from the usual mercedes ones iv seen on these engines,looks very robust!,and a bit clogged up?are you planning to replace the rings with brabus parts?.

As you say the wear on your skirts looks very minimal!,also the wear between the rings looks minimal too,if the ring lands are not worn and the bore shape is good you could simply re-use the pistons with new rings!?

Edit:
Based on how my stock pistons looked when i removed them these look like they have run farily hot??



Paul