IO540
All of your points above are true with the exception of (6). Arriving from the open FIR and flying an instrument approach does not "appear" to trigger the generation of an enroute nvoice for an otherwise anonymous pseudo-VFR flight in a 2t+, a least, not in my experience.
Apart from the intellectual challenge, I am curious as to why a self-confessed non-IR sub-2T flyer is so interested in this
