Not sure who will build the tank yet. I have contacted Great Lakes and they told me they don't offer custom sizes??? Thought that was strange.
Most certainly will be a drilled tank, but I'm considering an external overflow, not an HOB. So the rear panel of the tank will be 1" lower than the front. It will then drain into a 4" x 4" external box that will have the drain bulkheads drilled into it. I'm planning this like the Bean Animal System like this but it will be outside the tank footprint to maximize my space. I would love a 24" wide tank but need to take more measurements of the location where the tank will go. I may be limited to 18" or 20" in width based on the type of overflow I'm considering. I don't want to see any plumbing in the tank at all and it will be a rimless open top tank so I need the "sex" appeal of that.
Lol get your sex appeal! Great Lakes does custom cuts. I have bought three tanks from them and I will never buy from any where else again. Steve takes great care of his customers.