I don't understand! Are you saying your airline actually LOWERS V1 by 5kts?? Is this company/regulatory approved? A very dubious practice. Surely
IF V1 is called 5 kts early it is advisory and not actionable? IE In the situation you describe, no continued take-off would surely happen until V1? Re-assure me! I can see some perf guys getting quite edgy here.
