My trusty old GL1 seems to have finally run out of steam, or at least the heads have. I'm getting some block noise showing up along one side of the frame here and there and sometimes get the 'remove tape' error Cleaning hasn't helped. On the plus side, it still shoots beautifully to my firestore or computer over firewire. Anyone ever tried replacing heads on a DV cam on their own? A friend of mine has a GL with a cracked lens with much fresher heads...should I try this? I don't have a ton to lose since I can't shoot it to tape as it is now. Alternatively, does anyone have a suggest for somewhere to service the thing that's done a good job for them?