Fascinating stuff, thanks.
I know there are a lot of enthusiasts here for the older 80's bikes, but I really do think the industry took a big jump forward between the late 80's and the early 90's. The DB is my latest build and is 92, and it rides brilliantly, I have nothing modern to compare it to, my newest bike is a 2002 Yates, I love the Yates, it is my workhorse, but (for me) the DB is a better ride.
I also have a 1990 Roberts White Spider and that is something different again, it's light and climbs like a mountain goat, but it's pretty twitchy, and even with 560mm bars, you still need to keep your wits about you.
Luv em all.