It'll still take a little while for things to settle, so I wouldn't recommend adding much in the way of livestock for at least a week or two.
Also, is the Iwaki pressure rated, or just high flow? If it's pressure rated, make sure those clamps are on TIGHT or even reinforce them or re-clamp it with something stronger. I know someone who has blown a loose but not leaking PVC joint across the floor of his house, let alone vinyl with screw downs. Definitely be careful, and make sure that it's a secure connection before the dialing down valve.
Otherwise, I think this will really look great once settled in!