There are some very cool, "relatively simple", mods out there to make it easier to plumb them, increase flow through them and make them easier to clean.
The original Mod
http://www.nano-reef.com/forums/inde...ST&f=9&t=76847
An extremely simple Mod
http://www.reefs.org/phpBB2/viewtopic.php?t=108467
A more complex Mod
http://www.reefcentral.com/forums/sh...hreadid=843091
A SCWD Mod for the larger tanks
http://reefcentral.com/forums/showth...5&pagenumber=1
I'm thinking of trying one of these in the near future.