Looks pretty good. I like the general idea of your hardscape though I don't know how I feel about it being in the corner like that.
I just got some HC today that I'm going to do a dry start with. Can you explain your process? Like how moist did you keep it, how long were the lights on, how often did you vent, etc. I have a general idea what I'm gonna do but since you were so successful I want to compare.
Also any idea how to store the HC if I can't plant it right away? In the fridge? Or is it fine out at room temperature? It's at my house right now but I am going to see a band after work so I won't be able to actually set everything up until tomorrow.
Also did you use potted or a culture?