...rinse and repeat.
Sorry to hear that. Sounds like short of general recall on the product, these failures are going to keep showing up.
Call GC. They've shown themselves willing to make things right. For them it's only a $12 bracket on a $500 plate set, which is well worth it for them to maintain customer satisfaction.
So far mine are holding up on the street. First track test in 2 weeks at VIR.
2008 M3 Coupe / DCT
// StopTech BBK 380/355 / Pagid RS29 / Motul / Apex Arc-8 / BFG R1S / Ground Control / MS filter / Performance spoiler / BPM tune // Road Atlanta 1:39.80 / VIR Full 2:12.32 / Barber 1:42.20