I passed my RT oral earlier today, but reading this thread made me think of something I'd not thought about, but probably is so trivial it doesn't matter.
If a station abbreviates you're callsign, are you then allowed to use you full callsign if you wish?
I was chatting to my RT examiner after I'd passed, and he said that tyro isn't as widely understood as people think. My "flight" on the RT exam had "Qualifications: student pilot" at the top, and even though I thought "TYRO" as soon as I saw this, I forgot to use it. I thought I'd lose marks for this, but thankfully, I didn't
tKF