Wonderful photos!
But Im not 100 % sure it's a male until I see a photo from above. Male grow lots of odontodes and I dont think it's a visible in those photos. Females are have no odontodes at all and it's very easy to tell them apart.
I have 2+2 P.Maccus and they have spawn two times now. A pair or 2+1 could work as well. I think the important thing is to provide a tank with lots of woods and suitable caves. They can be breed in normal tapwater so RO water doesnt seem neccesary. I also think it will be easier if you have this species in the tank. I have had small cichlids in my tank and they have never breed until they were alone.
If you have any other questions feel free to ask and I will do my best to answer.