OP Here: Stars aligned, moon phase, training, motivation, tail wind etc. got me thinking WHY/HOW could I could I get better years later on a ride I probably have done over 100 times since. I think I know. STATINS. Doc wanted to increase level and I talked him into six month delay to see what I could do by myself. When I explained that I was getting ready to ride 100 mi. - he did one better and took me off altogether about one month ago. Thinking back a few years to how I feel after a couple hours and how I feel now - it is not the same body! I have normal (for me) problems with butt, hands and feet. BUT legs do not begin to tire like before. Three hour ride two days ago - heart rate 90% zone three and four. And I felt very good at the end.
As usual your results may vary - but statins are not for me as long as I can ride.