Well I finished this a while ago, but I haven't been able to get my hands on a digital camera (my bro being a prick as usual). I wanted to get pictures of it up, so I went to my last resort, using my camcorder to capture some pics, so
PLEASE excuse the quality of these pictures.
All pictures located
here
Incase you're wondering, I believe the size is 6x2x4", and everything was done on CNC.
2 Suction cups hold the overflow onto the back glass.
Inside view. All the teeth were milled out, using a bottlenose endmill to give it the smooth ramp. Figure this will make it less noisy when the water enters.
Now I haven't actually used this overflow yet. I don't have anything to use it with, however hopefully within the month, once my stand/sump is ready, I'll be able to try it out (I've tried the basic bathroom sink test, and it does flow water in rather quietly.