I gave up on #5, the other 4 are taking off. Very short internodes, already have 6 sets of nodes at 4-1/2 inches tall. I water with dirty aquarium water with homemade Fermented Fruit Juice, Lactobacillus Serum, and Lentil Seed Sprout Tea added. Still only using T5s for lighting, I will be adding organic nutrients and moving these into a tent in the coming weeks as they get bigger and start to smell more.
Looking great... I like the structure of number 3. I also have the same mutation you are describing and amazed at the growth and structure. Already a favorite!