Awesome. So now we're over that, let's get back to the OP's questions!
"I am trying to re-create the feel of my second racing bike I had a very long time ago and lost in a crash.
Never had anything as nimble and well behaved since.
Does anyone have any internet links, to a primer or framebuilder data on frame geometry? More specifically, covering the head tube angle and trail?
Ideally, also as relating to wheelbase and center of gravity height?
But just the info on racing, versus track, criterium, frame geometry would be great."