I am going to recap my c32, from what I gather this preamp was probably built in late 78 or 79. I notice that the little brown 10mfd-40v and 10-63 ROE caps on the tone control board, and a few other places. They are marked with + and -, I was under the impression that these were bipolar electrolytics , there is no polarity marking on the schematic. I was going to order some more caps to replace them (nichicon ES bpe). I already have some polar electrolytics (elna silmic ii) that are pretty good sounding. I'd love to use them there, but I wanted to confirm I can in fact use a polar e cap there and orient them the same as the ROE caps I'm removing. I'm a bit unfamiliar with that type of cap Thanks !