Hope so, because otherwise it would be a really crappy threadPics and mor info to come soon.
Do you have cross-beam supports beneath the plywood? I think you'll want to add them if you don't already have them. The plywood will sag in the middle and you've got to have consistent support beneath the acrylic tank.
Now that the overflow is cut out what what is your plan to cover the supply and return holes?
I just picked up a similer tank except mine has the overflow on the center back wall. I thought about removing it as well. How did you cut yours out? Dremal tool and a whiz wheel?
That's efficient use of resources. Nice!