Help Building a Sump

[Kevotron]

I am attempting to build this myself, however I dont know whether to use Acrylic or Glass or How high should the baffles be & position of the baffles etc etc
I would like to have a little section in which I can use as either a Refugium or an auto top reservoir.
equpiment that will be in the sump will be Bubble Magus NAC7 Skimmer, 1.5L Zeovit Reactor, and an internal pump (brand has yet to be determined)
I have included a couple pictures of the tank that will be turned into the sump
so hope I can get some great info/design ideas!!

[Kevotron]

I forgot to put the dimensions are 48x18x21 75G Marineland tank