LOL. I already have that problem, especially with the plywood top I added. I had to cut slots out in it for the pipes to go through. I haven't touched them since I bought the tank, and it was full of water right before I got it, so hopefully I won't have to mess with them. If I ever get a larger tank, it won't be bottom drilled.
Edit: Just saw your pic. That's what the bottom of mine looks like except I just cut a rectangular slot all the way to edge. I really like this large tank except for how heavy it is. With any of my previous tanks, if I needed to take it to the backyard to rinse it, or drill a hole, or whatever it was a 1 person job. With this one if I need to move it 6 inches I gotta call some one. Out of my friends/family I'm the only one with fish tanks, so it's usually more of an annoyance to them than anything,lol. My dad has helped me move tanks before and he still looks at a tank with a clown and has to ask if it's freshwater or saltwater. I guess you gotta love the hobby to care. Gonna have to give him " finding nemo" for his bday so he can tell the difference.