hhmmm he says "simply because it will be good to make a tight frame on the tank" he seems to think the angle will hold fine and that there is no way it could twist with the plexy in it. says "quarter inch plexy is plenty strong to be held strait with angle on the top and bottom of the tank."
oh my bad, i thought you meant the stand framing for some strange reason...
Having said that I do agree with sicklids last post. The plexy will bow and stress the joins inside the angle.
Cynotilapia afra 'Cobue'
Pseudotropheus acei 'Msuli Point'
Aulunocara stuartgranti 'chipoka'