Fits right in, I did some reading where people were saying they had to modify the drainage gap there so that the klir would work properly but I did not find that necessary - It actually is just barely above the amount of space required for the optical sensor to hit correctly. I may end up adding a second one but I don't think it's completely necessary.
I do have some detritus to clean up, but when I set up initially I put a huge portion of the larger corals in the sump for the first night because I couldn't see anything in the tank and it had hit about 1:00 a.m.