No problem!
I'm glad I wasn't just making things worse, lol! Though I have never used that particular micrometer, most micrometers are pretty similar in how you calibrate them. They're all basically the same design, with the ability to mount lots of different types of anvils to them.
It sounds like this one may not have that other hole I was talking about (what the large end of the spanner is for), or if it does it might be inoperative due to the nature of the anvil.
I wrote most of that before reading the instructions you posted, then thought - 'oh, crap - what if this one is somehow way different?'
The block I was talking about would be used by any lab you sent it to for calibration, but if you don't need the calibration to be 'certified', not using it isn't a big deal. We have them at work because all of our measuring instruments have to be calibrated and certified annually. I don't use them for my calipers and micrometers at home.