Sort of a hypothetical question, for a friend of mine (not me! I would never ask something as foolish as this). Say he pulled a capacitor out of an amp and did not note which direction the negative leg faced. The schematic is a lousy copy and, well, he kind of screwed up because he was riding a 60/40 rosin core high. Could you simply order a bipolar capacitor in the appropriate uF/V and have done with it? No guessing, no tears? Why doesn't everybody use bipolar capacitors? Wouldn't that make things easier?