Took apart my 2-KD Classic to do some maintenance. Noticed some cracks in the HV wiring that goes to the front panel switch used to switch the HV transformer secondary form CW to SSB. The insulation on this wire had become very brittle and would crack and fall off the wire when the wire was moved. Replaced all this wire with some HV cable I had on hand. Replacing the wire was "Tons of Fun". Is this a common problem with some models of Henry amps.? If so, does anyone know which ones to watch out for? What should one charge for this replacement?