Plumbing Questions

[Easto]

This is what I have:

75 Gal Display
40 Gal Sump (still need to pick up)
Mag 9 return pump (still need to pick up)
2 x Kessil A350W
BRS Dual Reactor
4 Stage Ro/DI unit
Vertex 130 Protein Skimmer
Vertex Refractometer
Pukani Rock

I need to build a stand and start to plum everything. I just want to make sure I have everything all figured out.

I was going to do a Herbie overflow, but then I discovered the BeanAnimal. Unless someone convinces me otherwise I think I will go with the BeanAnimal.

This is what I need to figure out (recommendations):

1. Size of the internal overflow

2. Bulkhead size

3.Plumbing PVC size

4. On the The Open Channel standpipe - what's the piece called that's drilled into the top with the airline hose attached? I just need to know what to look for at the hardware store.

5. Sump baffles: Can I use plexiglass and silicone them in or do they need to be glass?

6. ???? I am sure I am forgetting some more stuff and they will pop up as soon as I read a reply or two.