I'm just getting ready to plumb my new SC Aquarium 120 and realize that I cannot get my arm into the overflow due to the euro brace on the tank. It has 3 holes so I am going to run a herbie style drain with the middle hole for the return. It comes setup for the return to tee at the top with 2 returns. since my current tank has a HOB overflow, this will be my first RR tank. The question is if I glue the return tee into the bulkhead then install it as one, I will never be able to get to the other 2 drain pipes if there is an issue or I want to adjust the height later on. Anyone have any suggestions? Thanks.