DJ Short Flo and Bodhi Rainbow Serpent

The seedlings are small plants now, with a few nodes. They grew at uneven rates, with a few getting taller than the others and growing into the light very quickly and getting a bit burned. The plants were rearranged from shortest to tallest and the light angled to match, so it is an equal distance from all plants. I wonder if the height is an early giveaway that the tall ones are male. Flo 4 is tallest, followed by Flo 2. Flo 3 and RS are the shortest, with Flo 1 in the middle. So does that mean 2 and 4 will be male and RS and 3 will be female? Anyone care to make guesses? The leaf tips are starting to curl down a bit, so maybe the nutrient dose was a bit too much. The next watering will be either plain water or half water and half nutrients to compensate. The FloraMicro is for Hard Water but that is not an option in the nutrient selection. These will grow for another week and then they will be topped and the tops will be rooted, flowered, sexed, and the females will be grown out. These babies will be kept in veg as mother plants. I found another bagseed that was kicking around and I missed it during germination so I'm going to stick that in a peat pellet and see if anything happens. I do not have much hope, but nothing to lose. It looks large and dark, like a good seed should.