Ok, it something that was pointed out in the Empirical Cycling post cast in the link I posted above. Seem to make sense on the end of a long days but cannot correlate as I get occasional tinkles also (mostly indoors) near the beginning of the ride, even on short easy days. FWIW, I had the tinkle on the first climb of the day (mild) on that double some 20 miles out and I was fully topped. That tinkle stayed with me for a good 20 minutes before a slightly different tinkle (location-wise, outer thigh vs calf) hit at the last 30 minutes of the ride. Most of my cramps occurs mid ride on the flats section with many many more feet of climbing to go but dissipates before I hit the final climb. They're mostly my Saturday hammerfest, trying to stay with the As before dropping back on those 4+ hours rides.