as I said in my post earlier, they're correct and most definitely plausible. The guys at L&G are good are not just out to rip you off. The vibration is definetly caused by the disc and isn't touched when installing braided lines. As they and I pointed out, this issue rises when you have braided lines fitted. It did with me and new discs and pads solved the problem. I also had my lines fitted by L&G for the record but had the discs fitted independently.