looking good. i like the iwagumi lay out. looks like all your tech is set up for success. gl with the dry start. keep a tiny opening (size of a coin or so) so mold wont build up in there. squirt water mixed with a litle bit of liquid fertz for a slight boost in dry start. let it fully air out once a day to "water change" the co2 and o2 in there. give the plants on top of the hill extra water because it will eventually run down to balance out the growth between top and bottom. keep us updated on your growth!