aeroncaman,
A tad more complex than what you are suggesting but you certainly have the basic idea down pat ..
I am not sure that BFL means that the physical distance to accelerate to V1 is equivalent to the distance to stop from a reject just prior to V1.
Indeed, not ... especially if you have nosewheel brakes in the equation as well as main. If one of the posts suggested this, then I must be more attentive in future as I completely missed it ..
In general, stop distance will be considerably less than accel distance ...