We just manufactured and installed the hub rings on fellow TFI members. One was linea belonging to Mahesh with 17" wheels, the car had lots of issues like wobbling and stability. FASS changed many parts but still the issue remained. Finally after 2 years the issue got resolved by the hub rings. Second was Prasads punto, it was suffering from continuous bolt damages. He was running his car on 3 bolts as well due to this issue. We retapped the threads installed hub rings of correct specs and the issue is resolved. No wobbling even at extreme speeds. Bolts are also fitted perfectly. One thing i noticed during manufacturing and installation. The Alloy wheels do not have perfectly same ID standards. Even same alloys have variations in 50-100 microns. Also rust created dimensional inconsistancies. So measuring and manufacturing custom hub rings is the best solution and fitting them properly is also very important.