I've been making a DIY overflow the past week when I have time here and there. Tonight I finally cemented the pvc together, and think it's hilarious to look at the two overflows side-by-side. You can see how crooked the first one I did is (right side), compared to the second (left side), before I figured out how to do it properly, lol. The first one I followed some advice I heard about doing the elbow joints first, and using a flat surface to press the bottoms onto to make sure they are level - which when then adding the pipe parts, realized they weren't straight at all... haha The second one I got it figured... Once they're cured I'll cement the rest of the plumbing. Hopefully the crooked one still works ok!