And I owe Dave another big Thanks. An exact replacement for the pot on my newer Dodd pre turned out to hard to find. I had already tried to get some cleaner in the pot, but this time I tried, rotated, tried again, rotated, waited, waited, rotated, De Oxit spray, rotate, spray, rotate, rotate, rotate, spray... and just kept at it.
It's playing fine now. For how long??? but once again Dave's advice about staying with it proved to be correct.