I did replace the big caps. The details are in my post and in the “ordering guide” linked from post. The replacements are Digikey 493-8972-ND. See my write up on mounting them. I have also since bypassed them with some lower ESR polypropylene film caps that I had around from my coupling-cap test, but to no noticeable effect. yeah, mookauto is a terrible communicator, which makes it possible for him to get away with selling dodgy things to people. He never promises anything because he doesn’t answer questions. In the end, you hope for the best and he takes your money.