So after playing my JVC RC-550JW for a while, the cassette deck is starting to show signs of belt slipage. Anybody replace the belts on this thing? My google searches point to a drive belt of FBS9.6. I can't find anything about the counter belt, although that's of lesser importance. Also, it looks pretty tough to get at the belts. Any advice other than unscrew stuff and make sure you can put it back together?