Given the attention that rimless/braceless tanks have, just how much grief would it be to build your own? I've talking about something in the order of 6' x 2' x 2' or more. 1) do you need special glass, or does the glass just have to be extra thick (like twice the thickness?) 2) how hard is it to make sure you DON'T have excessive silicone around the edges, because that makes the tank look shoddy. I use to make acrylic tanks myself, but stopped since specialist companies are so much better at it, and it's always best to steer clear of dangerous bonding chemicals I had a word with my acrylic tank maker today and he tells me the best he can do is American top aquariums, where you basically have a lid as the brace, he doesn't want to do braceless. With glass, I'm more worried about moving/transporting the tank since that can be a dangerous affair (one of the reasons I opt for acrylic). But unlike acrylic a glass aquarium can be built on site, so I'm just wondering what's involved and how easy it is to get the kind of finish on the joints that the ADA tanks have.