Wavysea screw specs
 

If you ever plan to make your own Wavysea holders for the oversized brackets,
a) the three smaller screws that attach the Wavysea holder to the bracket will need a tap size of 6 x 1mm and predrill of 13/64" hole
2) the two larger screws that applies pressure to the tank's edge and bracket will need a tap size of 8 x 1.25 mm with predrill of 17/64" hole.

I made one out of 1/4" acrylic and I bent it over a 1" thick square frame. Make sure you keep the short edge flat.

This is just an information post for you DIYers and for me to refer to in the future.