I ordered components based on the build docs, but I just realized there's an inconsistency between that info and how the board is labeled. I'm specifically referring to the electrolytic capacitors at C4 and C2. Docs say 16V, but the board is labeled 50V (see pics). I'm new to circuit building and don't have enough experience to understand what is actually needed. Can anyone chime in with what I need to install? Thanks so much.