Decided to remove and regap all 8 sparkplugs which made a big difference in ease of starting. Most had gaps bigger than 0.022. Reset to 0.016.
While working around the plane the led work light stand tipped into the wing and put a dent on the top side of the leading edge of the right wing outboard of the fuel tank. It’s smaller than a dime and doesn’t affect airworthiness but I’m feeling pretty bad about it. I plan to research options for removing the dent via auto body service like dent masters or filling the dent with bondo and recovering with a small vinyl patch.