I don't have a table saw or a router to trim down a piece of aluminum with. But I can see what you're suggesting and can figure out something now. But see a little discussion and you got your point across.
While I still might not totally agree with you as I think spreading the load is already helpful as it is and then even more so with it bolted to the corners I do see your point and do agree that it would add more strength to the rear of the tub.
While I still might not totally agree with you as I think spreading the load is already helpful as it is and then even more so with it bolted to the corners I do see your point and do agree that it would add more strength to the rear of the tub.