Impressive numbers Phil.
Much to my chagrin the count (which was done in the usual way of timed-block-counting migrants), although I submitted it, was not accepted. All it produced was a rather sarcastic line in the Bird Report which implicitly downgraded the sighting. So I stopped submitting sightings (if they'd queried it I would have understood and backed it up) and have never done so since.
Did you ask why the record was not used and did you get a response? I'm guessing it was 2004, perhaps, but can't see anything that strikes me as sarcastic in the Bird Report for that year. It is unfortunate if this has caused you to withold records for the 13 years since. Nobody is obliged to submit bird records to anyone, of course, but if your reason for not doing so is a feeling of being slighted back then, perhaps it is time to give the local bird recording infrastructure another chance. With 70,000 or so records submitted per year, there are always going to be erroneaous reports and I'm sure we don't always get it right, but I'd suggest that observers ask for reasons if they think they've been unfairly treated. If you spend quite a time watching overhead migrants, also consider using Trektellen to put your counts in a national (or international) context.
Nick Littlewood (NE Scotland Bird Recorder)
I mostly watch from the house but to tell the truth the weather conditions at migration times in the last couple of years haven't been ideal for vismig when I've had the chance. But I shall certainly submit anything noteworthy in future.