Well I solved my problem... I decided to scrap the forth CL return hole with a piece of scrap acrylic and LOTS of silicone...
This made it possible to plumb the 3rd CL return in the back... All three CL returns have a ball valve at the base of the bulk head, to control individual flow..
Got 2 joints to glue, that I just gotta plumb into the pump. I think I will have a beer when I finish it... It's been an headache.
And a quick shot of the underside... which should be finished tomorrow.
