Thank you, Ed. I took an hour and a half solo ride yesterday, it was above 90 and a bit humid. The back of my shirt was soaked. Why, you ask? Because, Spyder!
But also because it was the first time since last summer's rebuild that I drove it that hot out and that aggressively. Temperatures stayed right where they should, 180-185 on the oil. Fan came on infrequently, like it's supposed to. I was trying to get it hot to see what the limits are, if any.
Once it got really warm, I had to richen two cylinders and lean the other two and boost the idle speed a couple hundred rpm. Purring along at 900-950 hot idle now.
I'll say it passed the test. Soon, I'll be installing 4 CHT displays to go with the K-type thermocouples that are already on the engine.