The new 18 x 8 1/2 with +1" rubber sure drives nice. The CTS wheels required spacer adapters of course, and I half expected I'd get at least as much rub on the sway bar as I had on my old FWB running stock SS wheels. But the A-arm grabs the sidewall in back instead of smooth rubbing as on the front on the bar. Search pulls up drilling/tapping the typically bent in existing stops using 1/4-20 adjuster bolt. Any experience with this repair or whether 1/4" is stout enough for the job?