Over the years, I have acquired three sets of Sony headphones, MDR-V6, MDR-V7 and MDR-7506. They all need repair. I have exploded views/parts lists for the 6 and 7, but not for the 7506. Anyone have one they'd like to share? I'll share mine, and I also have exploded views for the V600 and 7504, if anyone needs them. This is pure opinion I am sure, but which ones of the three I have are the best? And are the Beyer pads the way to go? Thanks.