Apistogramma macmasteri help

Hey guys, I know some of you are big dwarf cichlid fans, so I was hoping to get some assistance here. My LFS guy just text me that he's gotten some Macmasteri in stock (that I've been looking for a while now to get) and they're at ~1.25in in size currently. Is it possible to sex them yet, and if so, what should I be looking for? My main experience with apistos thus far has been Borellii but they're pretty obvious to sex.