A gentleman that does sound at our church is an electronics wizard and always fixes my amps, pedal, and electronicals for the cost of parts only. What a blessing that is!! I recently acquired a USA made HRD that was apparently used very little and still has the original Fender tubes. I took it to him last weekend to give it a thorough once over, check the tubes, etc. He called me this evening and asked if I wanted him to order and install a Fromel tube amp modification kit. I've purchased pedals from John but didn't know he sold tube mod kits. Anyway, I agreed to have the amp mod kit installed and wondering if anyone else here did the same? Did you like how the amp sounded afterwards? Did the audio taper help make the amp more usable from a volume standpoint?