You mentioned 10g sump, then someone said drill....I suggest acrylic or have kim put up a poll on how many 10g tanks break when drilling. If you do drill the 10g, go very very very slow with zero pressure and running water (hose) to keep it lubricated and cool. I know it sounds like common sense, but would want those to "chime in " on drilling a 10g. Just a heads up.
I'm running a 90g with a 40breeder sump. I have a 33 long as a display fuge for above the 90g. I'm going to plumb a mag 18(internal wet) tee'd to run the octopus 300 skimmer, chiller, media chamber and the return for both the 90g and the 33 fuge with gate valves to dial evrything together. Wish me luck