We think it's probably a she, as the body type is more female like than male.
She's doing quite well, we have seen her many times, she has found a cave of her own and haven't seen her fighting with anyone yet. She's quite big, though, and out of 6 plecos she the third biggest.
They probably will be fights at some point, because they need to set the hierarky, but she seems quite calm. Haven't seen her eat yet, though, but's it's normal behavior when moving to a new enviroment.
Recently I've sold quite a lot of my winemilleri babies. The first patch is now about 10 months old and out of about 40 I have 4 left. Those are going to a new home this Saturday. There will be still about 50 fry left to grow up since patches 2 and 3 are a lot younger.
I wish i could buy some i only have one winemilleri left, he seems quite lonely and seems to have made friends with my jurupari, but still i have to grow them out for 6 months again.