Nice pics, fushy. Mine looks the same, so I'll only post a couple of pics later.
My first comment: Open up the block and clean it out! Mine had a decent amount of sand left in it from sandblasting, enough that I wouldn't want it to be roaming around in my pump and the rest of my system.
Comment 2: Nice flat base! Good job DD.
Comment 3: The barbs appear to be epoxied in place, not actually threaded into the top. Very good idea. Perhaps this is why DD plastic tops are not known to crack.
That's all for now, I'll plug her in and see how she performs in a minute.
Thanks for the link, soja. Looks like I'll be making another WC purchase for my whitewater.