How many have they sold?

This would be some good info but, modifications, driver error, trying to get something for nothing and people just doing stupid stuff would taint a statistical account. Maybe warranties paid would be better but still to many dishonest people out their swapping the mod's to stock before a claim. Mutable claims on a single item might be the best numbers to look at if you could ever get them. If you stay on here long enough you'll learn the shortcomings of just about all models.