I was looking for a new tank and came across the Innovative marine 100ext. during covid it was going to be impossible to get this tank shipped to me in Canada so I decided to just draw it up in cad and check with a local glass company about getting the glass cut and polished . three side of the tank would be low iron glass and the rear panel would be notched for the overflow and drilled for the return lines .then there would be a sheet of 3/16 acrylic glued to the back panel with the overflow teeth cnc cut into it.