Good after noon ! I'm real unhappy with my sump & I have an acrylic 40 breeder just sitting on my Garageee . I'd love to use. It would work perfectly . However my beloved skimmer is too tall by 3 or 4 inches. I want to cut off as much from the top of this skimmer cup as possible. I could easily install a drain in case it got too full. I can't see any reason why not. Do You?