Working on setting up my 300gal tank and the previous owner ran a wet/dry sump so his return lines were only 1/2”. I am going with a traditional sump and running two ecotech m2’s. Acrylic is 1/2” thick and I have read the rule of thumb is 1.5x diameter of hole away from edge but with the previous holes being where they are will I have any issues over drilling them? I am planning on using a piece of 1x as a guide for the hole saw. I’ve seen people recommend using a router but I don’t own one and don’t think this tank is a good first time attempt if I were to buy one. Anyone offer any feedback on if I’ll have issues with the new hole in the picture below? I have 6 holes to drill out across the top