Hi, TechGuy! I like your measuring trick. My disc is is just a bit thicker than 2 nickels. And the two nickels were just a bit taller than the 3 dimes. We must wear are dimes out faster than our nickels, lol. So that looks good! It should be able to be re-surfaced.
I didn't really abuse the bearings. I couldn't find a proper screwdriver. I've been using the small bits in a handle. So the first screwdriver I came across I tried. It was not made for this type of thing, though. It's only about 4 or 5 inches long and the handle is about the size of an ink pen. The handle is hollow and almost see-through. Just not sturdy enough. But I tried it anyway. The first time I hit it, I knocked the plastic cap off the end and smashed the plastic handle. I think I abused the screwdriver, rather than the bearings, lol. They do turn and don't make any loud noises so they could be OK.
Being they are not the OEM or original bearings the previous owner must have replaced them trying to solve a problem. Could be they replaced bearings when they should have replaced the rotor or the caliper. I wish I knew, but I have no idea. I bought it as is from a dealer a couple hours away. At any rate I'm not against replacing them for the sake of starting fresh and knowing what is new and what is not new when I put it back together. I just hope I get to ride more than 60 or 70km this time.
Oh and don't worry about the spelling...it's just a nick name anyway.