Recently the grommets on one of my RDS 001's cracked in a couple of places (some of the plastic is just plain missing, showing the paint beneath) So I wanted to replace the grommets. my question is... Is it good/bad (or doesn't matter?) if I replace just the grommet piece that cracked (the other grommet pieces are just fine, IMO) or should I remove all pieces and replace them all? I got the top cracked grommet out just fine...just wondering if I should do it for all of the pieces or wait until they crack or need replacing. Thanks!