This is Z9 at 22 dah and 6.8mm.
Pleops are developing and now are biramous (two branched)and with 2-3 setae (hairs) at the tips.
I also found a well developed,transparent flagellum of A2 reaching the fork of A1.It must have shown some stages before but I missed it.
Detail of pleops at 50X:See the exopods budding to the left,like spurs.The first pleop,to the right is less developed than the others.
Closer view at 100 X,hairs at the tips :