I didn't realize that some of you may not be able to see this on ReefCentral.
I bought it used (with the unions glued on) - took it apart to clean it up and grease the drum. Runs very quiet. I used it less than a week in total. Closed loop.
Drum rotation is Ports #1 & #5, then Ports #2 & #6, then Ports #3 & #7, then Ports #4 & #8
I actually have two of these - identical. Both with the unions glued on and both work excellent. I never used the 2nd one, just cleaned it up and greased the drum. I bought it used also - for a backup.
$250