The weather is breaking! Everybody's out with their cars. 3 cheers for springtime!

Can I talk you out of changing 3 things at once? It obviously worked, but I'm just sayin...

If you can get a leaner cruise than 13.8 without upsetting the balance (and you're pretty darn close now) sure, go for it! It seems to be going richer as you go faster (14.6 to 13.8). Any way you can safely cruise it faster than 65 MPH and see what happens? (IE, does the curve continue toward rich) You might try a larger MAB, which will lean it out at higher airflow. What size do you have now? (I searched this page for the answer and nothing came up). Hopefully, you have some that aren't a huge jump up from what you have now. As I said, you're close.