7900A drive: 1 , Me - 0

So, this time I powered up and hit load. Waited 30 seconds, heard the heads move out to cylinder 0. Ran drive like this for about 3 minutes, no problem. Hit unload. When I removed the removable cartridge, I noticed the heads weren't quite retracted all the way. They were well off the media, but not all the way back home (the heads weren't touching each other, but they were close). Manually pushed the heads back, rechecked everything I could find. Repowered up the drive, after 30 seconds the heads loaded. Drive ready lite comes on and ran for about 15 minutes. No HDI sounds at all. I was elated. Hit unload, and after about 20 seconds heard very soft HDI. This time I left the cartridge in, powered everything off, removed the covers, and this time the heads weren't retracted at all. They were sitting right on the media. Strange thing is, there's no marks on the media, the lower heads I replaced look pristine, and the upper heads have only the very slightest indication of oxide.