I just used 0.1 uF Dayton film bypass caps in my EPI 201 project and am very happy with results. These were not well functioning before my resto so can't make A/B comparisons (and they would be from memory anyway). I used the bypass because of a suggestion from somone at another forum for a NLA project I was doing a while ago. He told me the following in regard to adding the bypass to NLA: "The 0.1 uF cap reduces hysteresis in the electrolytics and therefore, distortion." Can someone explain the theory in simple terms? Thanks.