Looks good. I just finished cycling my 40B a few weeks ago. I did a C2C with the BeanAnimal also. I cut my C2C about 3" short on one side and ran my return thru there. I got a small square of glass to cap off the end of the overflow. Works perfectly and technically, didn't lose any weir length because of the 90 degree corner on the overflow. If I remember right, my Overflow is about 3-1/2" x 3-1/2". I drilled the holes for the bulkheads, installed them and used spigot elbows (very little of the elbow actually sticks out in the overflow area) in order to determine the size of the overflow. My elbows are only about 1/32" off the bottom of the overflow glass. I then cut a bunch of slots in the drain elbows (like teeth on some overflows) to create a strainer sorta effect. You can make a deeper overflow, but you'll have to put PVC into the elbow to reach the bottom or have a strainer of some sort attached to it. I've had snails crawling on mine with no issues so far. Oh...I used 1" bulkheads and 1-1/4" plumbing on everything else. Exactly like Bean did originally. Probably a bit larger than I needed, but it works.