1) Can I use C3PO's ability to resolve a "blank" as a "special?" My reading of the Rules says yes
2) Can I use C3PO to resolve a "modifier" die as if it were not a "modifier" die? This boils down to whether the "+" is part of the value, part of the die symbol, or something else entirely making that side of the die follow "modifier" rules. I think you can't use it due to the third possibility per my reading of the Rules Reference.
Thanks!
to +2
, but you still can't resolve it as a single dice. The rules here is a touch vague, I had the same issue way back. The "+" is the Modifier, the number is the Value and the Symbol is the little icon,
for example.

