I would appreciate some input at this point about adding a second optical drive.
Do you think i should
I need to iron out ALL details before i start building the mold.
Personally I would design the case with as much flexability that keeps the cases' volume within reason.
Having space for a couple of optical drives is a good idea imho.
Also, consider future cooling upgrades (large format HSF's) or changes such as moving to water cooling.
just my 2-cents.
This is gonna be a really nice case, I look forward to seeing the results of your labors.