Seems to me that all you are doing is ensuring that the V1 call is completed AND understood by the PF by the time the speed reaches V1 which is entirely as it should be.
Precisely. I have observed literally hundreds of V1 calls in the simulator and thinking about it now, I would say the vast majority were called three to five knots after the ASI needle had gone through V1. This is due to the rate of acceleration and the PM not calling until V1 or shortly after. I have never seen V1 called before the ASI needle reached V1 - so the error is always when the speed is accelerating fast.
Despite tolerances built into the V1 speed I believe a call 5 knots prior to V1 of V1 is a commonsense pragmatic approach. Anyone aborting within 10 knots of V1 is asking for trouble based upon past history of the dangers of high speed aborts. Personal opinion only, of course
