Just to let you all know, i spoke to my QFM supplier and unfortunately for both the OEM replacement & K500 street/track pads, you are required to send your old backing plates to QFM and they will bind the compound to your old backing plate. I apologise if i have misled any of you, but i did not realise this was the case. Turn around time is up to 6 weeks but prices are still good if you plan on having spare pads lying around - $80 for OEM replacement & $150 for the K500.