IMHO A PO likely took the car to a European Foreign Car shop (VOLVO,AUDI,JAG etc) where the tech was familiar with how the K-jet works and knew how to work around the problem with a Quick fix. Likely because they didn't know where to get replacement parts for the car and it was a cheap fix at the time. There aren't many DIY owners out there that would know enough about the K-Jet system to do a mod like that. This is now the second time I've seen that exact same modification. Coincidence, I think not.