But wait ! I found a link that showed me how to slime my presta. (oh stop that). So I tried it and lo ! It seems to have worked. I reinstalled the tube, pressurized, seated, and put the wheel back in the dropouts, spun it.....and it's not out of round. Sweeet ! Just the flat was rubbing on the frame as i walked it home. Test rode, felt fine. Now we see if it holds under pressure. I slimed, inflated, and hung the tube in a manner that put the slime at the hole over night. It was still pudgy this morning.