. I'm also running a M90 reef and definitely dream about when the time might come to upgrade to that ~4x2x2 footprint tank. So I peruse BRS and have definitely looked at that Waterbox. I've also looked a lot at the similar volume Fijicube 108 EXT, because I thought the inside of the tank looks so darn clean without the overflow box in there. But this is also my first tank, so folks more knowledgeable than me might have reasons to say "Don't get an external overflow you dummy." 
I love a external overflow. The only issue is that the one Fiji supplied with the Fiji 2'X2'X2' cube is too small so its harder to tune.Welcome back
So while I can't provide any direct experience, I'll be excited to live vicariously through you if you do get a new tank. Please do a build thread
That is the current tank I’m running and have had lots of trouble tuning. It’s minor issues with little noise. But I feel I’m getting close. The price they have on this tank is crazy cheap if you didn’t see. They had 2 left on clearance.
They posted some clearance tanks awhile back and still had the cubes available when I reached out.
Still looking into them? We have installed quite a few over at @New Wave Aquaria recently and they are insanely well engineered tanks. But make sure you bring twice as many movers as you think, they aren't light by any means with the shear thickness of the glass they use. Very sturdy!We always come back
Im still keeping my M90 running, but have some space and thinking about upsizing a bit.
Any opinions on waterbox aquariums? Specifically looking at the 110.4
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Awesome! I'll keep an eye out for a build thread. Glad to see old members setting back up!
