from the looks of your set up i have a suggestion.....once you get all your males out and have an amount of females to work with......you might get better yield if you take all your females and put them in a circular pattern....you could then take the one HPS and put it on the floor in the center of the circle...take the other one and float it above like you have now....this will give you greater light towards the bottom and mid of your plant.....i have two the same way and what a difference when i changed it like i described.,.....i do however only have 4-plants so this may or may not work....
peace