Help from the DIY sump gods

[WindowMaker]

Hey all,

Im starting to build a new stand and it seems like the perfect time to build a sump.

My dimensions will be roughly 48x12x14 tall (suggestions here please)

I would like to integrate room for a filter pad, bubble trap, skimmer, internal pump and refugium.

not overly certain about what order to line everything up in.

Opinions and input greatly appreciated.