I picked up a ETSS skimmer body a while ago. It's a downdraft type, but I didn't want to run a huge pump on it. I drilled it for 1" and 3/4" uniseals and stuck in the Sedra that I got last year from Eileen. Tested it out, and it's quiet enough, plus makes a ton of foam. Here's a pic from last night: Here's a manufacturer's pic: I've replaced the injector with pvc for a direct feed from the overflow. No more bioballs. Plus I changed the outlet to a Hartford loop type configuration.