Well I finally completed the drilling of the CLS ports and the overflow on the 180. Thanks to those who gave me advice!
This cls rocks so far. I of course added ball valves before the inputs so I could adjust flow. Wow.... This GenX70 with a 2" input and 3 3/4" outputs really puts alot of motion in the tank.
Tomorrow I'll work on completing the overflow to the sump project!
Im just glad this cls is working. Now no more pumps inside the tank itself! It's nice! (may need to relocate the Cloves though...they may be getting tooo much current).
Again thanks all for the howto's!