The glass under that trim is most likely not only sharp, but may not line up in the corners. I took apart a tank from a "local", and the glass was off by nearly a HALF INCH in one corner. (The space was filled with silicone. )

As for the euro brace idea, I like that over going straight rimless with a 3/8" tank. A 1/2" I would be all for going rimless on.