Hello
You said just below V1, well I would continue.
I havent read most of the responses on this thread but will.
As for the current thinking on aborts/stops. The TO should be divided into 2 regimes, low speed and high speed. The deciding factor is 100 knots, this is now industry standard is being taught by Airbus and Boeing.
Most of the overuns have been with good engines operating and most fire warnings are for a BLEED LEAK which can be best handled in the air rather than off the runway.
For me, I dont abort unless its for an engine failure before V1.