I received a replacement
UJ8A8 drive, 9.5mm from Amazon, and upon opening up the unit discovered that the existing non-working drive was actually a little thicker. Existing drive is attached to frame by two metal brackets. The 9.5mm
UJ8A8 drive has existing holes that line up perfectly with the brackets, and the thinner
UJ8A8
9.5mm drive aligns perfectly with the slot once attached to the brackets.
Fired it up, and worked like a charm!
Hats off to Brennan for designing the B2 to be VERY easy to wok on!