That's just about right, even at this distance.
I thought I was following the theory (and knew about Geller) but in fact the theory, according to John Emms' Tarrasch book from 1998 had 12...O-O? and recommended taking the c4 pawn instead - not, in truth, that that's much better.
I was living in Newcastle at the time and went on the train, via Glasgow. The last stretch is spectacular, winding through the mountains, and the train stopped at at least one station for much longer than normal, as if it was exhausted, with the passengers getting out to stretch their legs and inhale either fresh air or cigarette smoke according to their taste. I remember one guy had his Tartan Army gear on and had obviously been at Wembley two days before when Scotland had come pretty close to hauling back the two goals they were down from the home leg.
I came pretty close myself, though as far as I recall, despite playing on top board in the last round I ended up without a penny to show for it. But that wasn't so important.
I do remember that when I resigned, I looked up and there seemed to be dozens of people clustered around the board. Up to then I'd not noticed a single one of them.
Here's a couple of playthroughs. I can't remember if we even had playthroughs in those days. It was a whole different millennium. I used a different forename. And many things were different then.
The past, if nothing else, is a different country.