Filled up the tank and sump with fresh water for a test this weekend. So far return pump has been running for 24 hours with no leaks. Knock on wood but I think all of the fittings are good. I used both Teflon tape and paste on the threaded pipe. Purple primer and blue glue on slip fittings. Even got the refugium plumbing installed and working .
Also moded the overflow cover to fit the over the top return lines I painted and installed. I think it has a niece clean look.
HAHA! Good going Dave. Glad to see you're happy with the tank.