RWU - Sure, Hudson's words were:
to have the crew initiate an abort at the fire bell providing the speed is an appropriate safe figure below V1. 15 knots, maybe
I don't think you need to be 15kts below V1 to
initiate the abort. Otherwise what does V1 mean?
I have myself (real life) initiated an abort 2kts below V1 at max t/o weight, and the figures worked fine.