[chopper]

I'm going through the same drill with the rear brakes on my car. I talked with a local shop, and he said his literature lists the minimum thickness of the solid rotors as 11.4 mm or 0.450 inches. I'm not familiar with any other type of rotor for the Jag rear brakes, so this may not be very useful in your case.

And, yes, getting the brakes off the Jag rear end is a task. When I called ERA to ask them how the rear calipers came off, they told me "Usually with a lot of swearing." How true, how true. You need a relatively long box-end wrench to break the two bolts loose which hold the caliper to the differential housing, since you have to remove them from the differential side and you can't get any type of air wrench in there (at least, I couldn't). I think all of the rest of the bolts will come off pretty easily with an air hammer if you have one. Once you have the half-shaft loose at the disc, remove the shocks/springs and you can swing the lower arm down to gain enough clearance to remove the brake disc. Hope this helps.