I seem to think it may be on the rich side still. I would just richen it up and do the pinch test.

Another thing to check "just in case" is your fuel lines & tank. Check to see if your fuel line with clunk does not have a hole in it and is still attached inside tank. Also trace your fuel lines to make sure you don't have a small pin hole in it also. That can cause it to lean out and heat up.

Also is the engine in a cowl? if so that would also make it heat up if proper cooling vents was not cut out.

If not it sounds a bit confusing being that you had the engine run good on other planes.