well, as an engineer as well, and knowing a few tank builders, If you mean the bits of angle on the corners don't bother..They are for cosmetic purposes only and offer absolutly no structural strength whatsoever.
If you mean the strapping around the top edges of the tank that the lids sit on, yes bother. it is essential as it IS a main part of the structural strength of the tank.
they are using 10mm glass is it ok or safe if I don't want the corner rims?
Yes it is safe. btw any tank above 20" high is required to have 10mm+ glass.
What I did was had the front glass panel glued on with black silicone..and if they are a good tank builder it will be trimmed in a nice neat line and look fantastic.
I could engage everybody in a discussion on force vectors and hydrostatic and hydrodynamic pressures but I'll spare you the pain.
Please do..I'm interested to see how you can justify that this tank needs the corner bracing..(If I understand correctly that is what this person is talking about)
weekf, where in australia are you? If west coast I may be able to suggest some great tank builders who will save you the cost of buying from a shop.. If East coast or thereabouts I can at least point you in the right direction if you are not aware of it already..