Just bought the OER AC vents for the right and left side of lower dash. They dont tell you that they do not come as a complete assembly with the chrome lever/knob thats used to open and close the vents so you have to reuse your current ones. My question to those who have done this is how did you attach the lever to the new OER vent? The raised round area on the OER vent where the lever attaches is a little smaller in diameter than the mating area on the lever plus there is no hole for what I'll call a rivet. Even if you drill ahole and make the rivet a tight fit that will be the only thing holding the lever on. Any help would be appreciated.