Do you have the break down of dims for each chamber? Are you going 4" or 7" socks? The bubble trap looks like your skimmer water level would be pretty high which doesn't leave much room for DT back flow redundancy (power shutting off and DT draining back into sump). What's the preferred water level of your skimmer? If it allows for lower than I'd def go lower. Also if you don't need all that room for skimmer/reactors I'd def add a wall and make a fuge section