how would those be held in place? You won't be able to get to the nut in order to swell the rubber insert if i see that correctly, unless you cut another whole just big enough to get small plyers or something in there, or gluer them in?
2007 Speedmaster and miss it!
2013 T-Bird Storm and Luvin it!
Catching a yellow jacket in your shirt at 70 mph can double your vocabulary