I like a lot of what Mattax suggested. Start with setting the timing and the WOT. Does your carb cruise at 50+ MPH on the mains or the idle? If it cruises on the mains, I would go easy leaning the slots. It could cause a slight stumble at tip in. Although the DPs are very rich on the street.

I also agree that it would be best to deal with the cruise on the street. But if your LM-1 is on the fritz.................