Looks very female to me. I noticed when mine were a bit smaller (probably 3”). the spermathica were basically completely hidden behind the uterus which at first made me believe male, but the next molt i was able to correctly Identify. It may have just been my inexperience (was pretty early on in my keeping) but i remember that the actual spermatheca were very well hidden. LOL
I know it's been a while but I can't help but answering.
The fact that it has spermatheca makes it pretty much 1000% certain it's a female, jeees. Someone even wrote "I also see a flap between the spermathecae.".