Turns out to arguably be the best advise in the thread. Went to the LFS yesterday just to look. It was great seeing all the displays and fish. But I told the wife it made me sort of sad looking at the brand new tanks already set up with overflows and realizing what it is taking to polish my "great deal " turd. She blew me away when she said " Well if you can't get this one to come out right, why not just buy a bigger one new and use this for the sump ?"Pan World is great, but I would go for more power to match the flow you need. I know you are already committed by purchasing the used DT. But if that DT (that cannot be drilled) is dictating several other decisions, I would reconsider whether you just buy, new, precisely what you want in a tank. So much in this hobby can be found used locally, as people upgrade lights, pumps, powerheads, etc. But tanks show wear and tear, and if it is not precisely what you want. I bought my tank pre-drilled for this reason.