I sold my VorTech Dry Dock Box, it started becoming a big PITA, and I was worried about overflow, it also restricted flow in my 2nd chamber really badly which often times flooded my Sapphire Aquatics Skimmer in chamber 1. All in all, I didn't like the amount of paranoia I was getting from it and the flow it cut off.
I think it would work perfectly, with redesigned dimensions. Not as deep front to back and not as tall, this would allow water to flow under and behind it and would not cut off water flow. Sort of a floating box, not one that sits on 2nd chamber grate holders.
I think someone needs to invent a dry/wet sock for the VorTech, like what a diver would wear, that would allow the magnet to still work and yet keep it dry...I used a zip lock bag for a test and it worked great. So something like the waterproof diver material, that would fit like a sock around that power head, yet keep it cool, and water proof, where the magnet would still work and you could put it in the back of the 2nd chamber and yet not worry about the water rising back there.
The box idea was great, but when combined with the skimmer I bought, not the stock, it becomes dangerous.