I need to replace the combo drive in my Mac mini G4, and I'm seeking guidance on how to determine what drive will work. My mini is somewhat of an anomaly, as the box, and the serial number, shows that it should be a 1.25 gHz machine, but the System Profiler says it's 1.33 gHz. The Powermac build is 10,2, instead of the more common 10,1. The drive is a Panasonic model CW-8124-C. The other numbers on the drive are Combo 8124A, 678-0508B, and PA5290J76SHBA. I purchased a couple of drives that were listed as "compatible", but they weren't. They were marked CW-8123-C, number 678-0483F. So my question is: What numbers should I look for on a replacement drive, the CW- number, or the 678- number? Or should I look for something else?