I've got a pair of 12yr-old Nordmende SVHS decks (JVC HR-S5000/5500 in a different case). Playback has been noisy for a while and I want to spruce them up in their old age as I'm rather attached to them. Any tips/guides/advice would be very much appreciated. And are spare heads still available ? New or otherwise, if need be. Where should I start looking for spares. Cheers, Mike.