Hi guys, I recently planned my plumbing and opted to go durso overflow. But found out that my built in overflow are too small to accommodate the durso fitting for 1" and I can't go any smaller since my system is a 180g, and planning to have high sump turnover rate. I'm thinking about going herbie but don't have enough space in my overflow box. Can I get away with drilling a hole in the back and using a 90 facing upwards as my emergency drain? (pictured below) Since it is an emergency drain, I'm also planning on making it 1 1/4" so it can handle a more flow worse case scenario.