Max Sump Measurement Sizes for the Vertex IN-100

[gregzz4]

Thanks for the input everyone. My tank isn't running yet and I want to get this solved first.
I rushed my original post. I have a Skimz 181 and have designed my sump around it. I'm concerned about the future. If/when it craps out, I won't be able to fit any other skimmers in it's place.

[gregzz4]

Well, I tore the sump apart tonight after re-designing it to fit almost any Skimmer in the future. I'll have 17-1/4 x 11-5/8, minus the plastic trim. So, 16-3/8 x 10-15/16. If I can't fit a future skimmer in there, I'll be surprised.