I have done the CHF (both front and rear) and tuned the tire pressures based on actual loaded corner weights. It made a notable difference, but it still wants to dart in gusty winds, and also has a tendency to lean to the passenger side. I am debating between Sumo springs and air bags... The airbag route seems to be a little less expensive depending of course on the compressor setup, but I like the idea of no maintenance with the Sumos. I know exactly what and how an airbag setup will perform, but I've never run Sumos so I'm a little nervous to spend the money on them? Anyone have a direct comparison story?