I had my original PCM tuned by another company.
Because I'm running such a large intake on my engine my tune needed to be tailored for it. The WAMS tune worked just fine but I got higher fuel trims than I would have liked thanks to my oversize intake.. If I could get the car to WAMS to update the tune it wouldn't be an issue. But I went another route for cost purposes. I was able to get my tune dialed in for my specific intake setup.
Being the 4 cylinder WAMS doesn't have a car to write a tune for and as far as I'm aware the V6 tunes are written to work with the crabs intake kits because he had/has access to that engine and intake.