lamination schedule question

[erebus]

I'm doing some laminating with 2 layers of 3/4 coosa/penske and west system epoxy.
Couple of questions for you glass gurus:

Do I need to put a layer of glass between the layers of coosa/penske (mat, 1708, straight cloth), or just thickened epoxy?

After putting down a layer of 1708 (mat side down) do I need to put a layer of mat (epoxy compatible if I can find it) on the cloth side of my 1708 before putting down the next layer of laminate (if the next layer is not 1708, but is coosa/penske or outside skin)?

Is 1708 sufficient for tie-ing together old skin and existing hull (after a nice 12:1 scarf)?
Should I finish with a layer of straight cloth to make fairing a bit simpler? What weight?

I've been searching the forums for hours, and these are the only questions I have left.
Thanks!