The Fulltone"CLYDE" was born from taking the best of the best of Fuller's more than 25 pc. vintage Vox wah collection, and analyzing every aspect... going so far as sacrificing a few of the vintage inductors to get it right. The problem with the old (and other company's new) inductors is that they're generic industrial grade cheapos that vary as much as 30% in tolerance, some of my mediocre Vox's measured in at at 360 mh. when they are supposed to be 500mh.