Luckly my model number contains a -004. That's good news.
Things are going along almost perfect now. The only problem is short dropouts on high demand. I am using this to store audio for a radio station, and when I put a load on the snap with another computer, I'll sometimes get two or three seconds with no input from the snap, and this results in a one second blank spot in the middle of a song or news report.
I guess I'll have to find a workaround. maybe I'll just reformat and biuld a mirror, or maybe I'll just connect the drives locally and use the other two as backup inside the snap.
It's a shame, I was so close...