Nice setup. Are you having any issue with algae where the perlite is exposed? Also what fittings are those that you used going into the tubs?
I've been doing SIPs and was considering using a master/control bucket and add the fittings/tubing so that I could monitor them all and top-off water from one place (possibly with a float valve/rez attached). Prior to that I had considered a similar setup for being able to monitor the water level but also was worried about the light exposure so was thinking I'd have to make some type of black-out/cover to prevent funk in rez and then only remove when I need to inspect the water level.
I might try a swick sometime soon instead of a SIP just to compare them. The SIP won me over initially because the air gap sort of made sense that it would prevent things being too wet and you controlled how much moisture was available through size of wick and type of material used.
Looking good on the training as well.