when you get the skimmer, set it in the sump, figure out the smallest amount of room it will take, (remember to leave a little space for working and your drain from the tank) then set up your bubble trap, then just put a simple baffle in the middle of the space you have left. have the return in the middle, and the fuge on the oposite end from the skimmer. get a small
power head and a piece of hose to pump water up too the fuge, and just let it overflow back into the return area.
(do the gatevalve mod on the skimmer as soon as you get it!

makes dialing it in so much easier.)