I bought the Marineland Corner overflow rimless. Also bought the stand that gave me a lifetime warranty but I am afraid to use it. the front to back sits about even but it seems left to right it sits right on the seams of glass not much wiggle room. Don't have a photo hosting to share the pictures here. I might just go DIY so many people tell me the Marineland stands are junk.
Here is a little clip I did quick.
https://youtu.be/FX9NvShlFGU