I am still, well "was" using my PPX3 I bought from another head-fier circa Aug-Sep 2004. I tried to search the thread for PPX and read many thoughtful posts by Dr. Gilmore, and still unsure if my unit would need extensive repairs for safe operation. Would I be wrong to assume most serious issues were with the Extreme and some of the higher end units SP sold? Come to think of it, having my unit repaired and upgraded by Boulder had been a plan for a while, I just never got around to do it.
The last time I powered on the amp was about 2 years ago and it worked fine back then. Not entirely sure what upgrades it had as I've lost all my transaction PMs with the previous owner; I do know it doesn't have the slam upgrade/adapters, just the standard 6cg7 deal with two headphone outputs as an option.