Yes, I figured I would be drilling my own hole. Is there any reason not to drill that hole at the bottom? I will be using the braided SS approach to prevent it getting clogged. I know fist fights have broken out over this, but it appears to me that with a larger rectangular cooler I can better achieve my 2" or so grain depth than with the rounds. I think I'm looking at 15-18 pound batches.
I'm going to admit I do not plan to switch to grain, I think the extract method is already too time consuming, this would be for, at best, ocassional use (2 or 3 batches a year).