I know this had been discussed here before but has anyone had success finding the VTL5C4/2? I tried making my own by combining two LDRs and an LED, in a few variations, but haven't ever had success. The pedal turns on and works fine in bypass but when the pedal is engaged, with any combination of LDRs and LEDs, it just sounds the same as in bypass. Any thoughts on where to get the right vactrol or combinations to make your own?