I think you have the right approach, use the car, on a frequent and regular basis, as that invariably IMHO improves the reliability of the car. I've found low mileage infrequent use, stored over long winters Morgans to be a pain, and generally improve with regular use. No motor car suffers long periods of inactivity well, and the Morgan is no exception. For myself the later MY23 cars appear to be the sweet spot ( with the requisite radiator upgrades),